diff --git a/src/main/java/dk/camelot64/kickc/fragment/AsmFormat.java b/src/main/java/dk/camelot64/kickc/fragment/AsmFormat.java
index efbc15624..93d919fcf 100644
--- a/src/main/java/dk/camelot64/kickc/fragment/AsmFormat.java
+++ b/src/main/java/dk/camelot64/kickc/fragment/AsmFormat.java
@@ -96,7 +96,7 @@ public class AsmFormat {
          SymbolType operandType = SymbolTypeInference.inferType(program.getScope(), operand);
          if(SymbolType.isByte(operandType) || SymbolType.isSByte(operandType)) {
             return getAsmConstant(program, operand, outerPrecedence, codeScope);
-         } else if(SymbolType.isWord(operandType) || SymbolType.isSWord(operandType) || operandType instanceof SymbolTypePointer) {
+         } else if(SymbolType.isWord(operandType) || SymbolType.isSWord(operandType) || operandType instanceof SymbolTypePointer || SymbolType.STRING.equals(operandType)) {
             return "<" + getAsmConstant(program, operand, outerPrecedence, codeScope);
          } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
             return getAsmConstant(program, new ConstantBinary(operand, Operators.BOOL_AND, new ConstantInteger((long)0xffff)), outerPrecedence, codeScope);
@@ -107,7 +107,7 @@ public class AsmFormat {
          SymbolType operandType = SymbolTypeInference.inferType(program.getScope(), operand);
          if(SymbolType.isByte(operandType) || SymbolType.isSByte(operandType)) {
             return getAsmConstant(program, new ConstantInteger(0l), outerPrecedence, codeScope);
-         } else if(SymbolType.isWord(operandType) || SymbolType.isSWord(operandType) || operandType instanceof SymbolTypePointer) {
+         } else if(SymbolType.isWord(operandType) || SymbolType.isSWord(operandType) || operandType instanceof SymbolTypePointer || SymbolType.STRING.equals(operandType)) {
             return ">" + getAsmConstant(program, operand, outerPrecedence, codeScope);
          } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
             return getAsmConstant(program, new ConstantBinary(operand, Operators.SHIFT_RIGHT, new ConstantInteger((long)16)), outerPrecedence, codeScope);
diff --git a/src/main/java/dk/camelot64/kickc/model/operators/OperatorGetHigh.java b/src/main/java/dk/camelot64/kickc/model/operators/OperatorGetHigh.java
index c1760639a..734e50e0c 100644
--- a/src/main/java/dk/camelot64/kickc/model/operators/OperatorGetHigh.java
+++ b/src/main/java/dk/camelot64/kickc/model/operators/OperatorGetHigh.java
@@ -1,12 +1,14 @@
 package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
+import dk.camelot64.kickc.model.ConstantNotLiteral;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
 import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
+import dk.camelot64.kickc.model.values.ConstantString;
 
 /** Unary get high operator (>b) */
 public class OperatorGetHigh extends OperatorUnary {
@@ -26,6 +28,8 @@ public class OperatorGetHigh extends OperatorUnary {
          }
       } else if(operand instanceof ConstantPointer) {
          return new ConstantInteger(((ConstantPointer) operand).getLocation()>>8);
+      } else if(operand instanceof ConstantString) {
+         throw new ConstantNotLiteral("address of string is not literal");
       }
       throw new CompileError("Calculation not implemented " + getOperator() + " " + operand );
    }
@@ -36,6 +40,8 @@ public class OperatorGetHigh extends OperatorUnary {
          return SymbolType.BYTE;
       } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
          return SymbolType.WORD;
+      } else if(SymbolType.STRING.equals(operandType)) {
+         return SymbolType.BYTE;
       }
       throw new CompileError("Type inference not implemented "+getOperator()+" "+operandType);
    }
diff --git a/src/main/java/dk/camelot64/kickc/model/operators/OperatorGetLow.java b/src/main/java/dk/camelot64/kickc/model/operators/OperatorGetLow.java
index 080219200..6fa234860 100644
--- a/src/main/java/dk/camelot64/kickc/model/operators/OperatorGetLow.java
+++ b/src/main/java/dk/camelot64/kickc/model/operators/OperatorGetLow.java
@@ -1,12 +1,14 @@
 package dk.camelot64.kickc.model.operators;
 
 import dk.camelot64.kickc.model.CompileError;
+import dk.camelot64.kickc.model.ConstantNotLiteral;
 import dk.camelot64.kickc.model.types.SymbolType;
 import dk.camelot64.kickc.model.types.SymbolTypePointer;
 import dk.camelot64.kickc.model.types.SymbolTypeSimple;
 import dk.camelot64.kickc.model.values.ConstantInteger;
 import dk.camelot64.kickc.model.values.ConstantLiteral;
 import dk.camelot64.kickc.model.values.ConstantPointer;
+import dk.camelot64.kickc.model.values.ConstantString;
 
 /** Unary get low operator (<b) */
 public class OperatorGetLow extends OperatorUnary {
@@ -26,6 +28,8 @@ public class OperatorGetLow extends OperatorUnary {
          }
       } else if(operand instanceof ConstantPointer) {
          return new ConstantInteger(((ConstantPointer) operand).getLocation()&0xff);
+      } else if(operand instanceof ConstantString) {
+         throw new ConstantNotLiteral("address of string is not literal");
       }
       throw new CompileError("Calculation not implemented " + getOperator() + " " + operand );
    }
@@ -36,6 +40,8 @@ public class OperatorGetLow extends OperatorUnary {
          return SymbolType.BYTE;
       } else if(SymbolType.isDWord(operandType) || SymbolType.isSDWord(operandType)) {
          return SymbolType.WORD;
+      } else if(SymbolType.STRING.equals(operandType)) {
+         return SymbolType.BYTE;
       }
       throw new CompileError("Type inference not implemented "+getOperator()+" "+operandType);
    }
diff --git a/src/main/java/dk/camelot64/kickc/model/types/SymbolTypeInference.java b/src/main/java/dk/camelot64/kickc/model/types/SymbolTypeInference.java
index b985f8fbd..3c6ff7000 100644
--- a/src/main/java/dk/camelot64/kickc/model/types/SymbolTypeInference.java
+++ b/src/main/java/dk/camelot64/kickc/model/types/SymbolTypeInference.java
@@ -34,7 +34,9 @@ public class SymbolTypeInference {
       if(rValue instanceof ConstantValue) {
          // Calculate resulting constant literal
          try {
-            ConstantValue value = operator.calculateLiteral(((ConstantValue) rValue).calculateLiteral(programScope));
+            ConstantValue constRValue = (ConstantValue) rValue;
+            ConstantLiteral literalRValue = constRValue.calculateLiteral(programScope);
+            ConstantValue value = operator.calculateLiteral(literalRValue);
             return value.getType(programScope);
          } catch(ConstantNotLiteral e) {
             // Value literal cannot be calculated
diff --git a/src/test/java/dk/camelot64/kickc/test/TestPrograms.java b/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
index 246843aa8..16bf07f04 100644
--- a/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
+++ b/src/test/java/dk/camelot64/kickc/test/TestPrograms.java
@@ -14,7 +14,6 @@ import org.junit.Test;
 import java.io.*;
 import java.net.URISyntaxException;
 import java.nio.file.Path;
-import java.util.ConcurrentModificationException;
 
 import static junit.framework.TestCase.fail;
 import static org.junit.Assert.assertTrue;
@@ -42,7 +41,23 @@ public class TestPrograms {
    public static void tearDown() throws Exception {
       CompileLog log = new CompileLog();
       log.setSysOut(true);
-      AsmFragmentTemplateUsages.logUsages(log, false, false,  false, false, false, false);
+      AsmFragmentTemplateUsages.logUsages(log, false, false, false, false, false, false);
+   }
+
+   @Test
+   public void testVarForwardProblem() throws IOException, URISyntaxException {
+      try {
+         compileAndCompare("var-forward-problem");
+      } catch(CompileError e) {
+         // ignore & return
+         return;
+      }
+      fail("Expected compile error.");
+   }
+
+   @Test
+   public void testInlineString3() throws IOException, URISyntaxException {
+      compileAndCompare("inline-string-3");
    }
 
    @Test
@@ -66,17 +81,6 @@ public class TestPrograms {
       compileAndCompare("bool-vars");
    }
 
-   @Test
-   public void testInlineString3() throws IOException, URISyntaxException {
-      try {
-         compileAndCompare("inline-string-3");
-      } catch(CompileError e) {
-         // ignore & return
-         return;
-      }
-      fail("Expected compile error.");
-   }
-
    @Test
    public void testC64DtvBlitterMin() throws IOException, URISyntaxException {
       compileAndCompare("c64dtv-blittermin");
@@ -102,17 +106,6 @@ public class TestPrograms {
       compileAndCompare("inline-string-2");
    }
 
-   @Test
-   public void testVarForwardProblem() throws IOException, URISyntaxException {
-      try {
-         compileAndCompare("var-forward-problem");
-      } catch(CompileError e) {
-         // ignore & return
-         return;
-      }
-      fail("Expected compile error.");
-   }
-
    @Test
    public void testLoopProblem2() throws IOException, URISyntaxException {
       compileAndCompare("loop-problem2");
@@ -254,11 +247,11 @@ public class TestPrograms {
    }
 
    @Test
-    public void testComparisons() throws IOException, URISyntaxException {
-        compileAndCompare("test-comparisons");
-    }
+   public void testComparisons() throws IOException, URISyntaxException {
+      compileAndCompare("test-comparisons");
+   }
 
-    @Test
+   @Test
    public void testMemAlignment() throws IOException, URISyntaxException {
       compileAndCompare("mem-alignment");
    }
@@ -711,10 +704,10 @@ public class TestPrograms {
    private void assertError(String kcFile, String expectError) throws IOException, URISyntaxException {
       try {
          compileAndCompare(kcFile);
-      } catch (CompileError e) {
-         System.out.println("Got error: "+e.getMessage());
+      } catch(CompileError e) {
+         System.out.println("Got error: " + e.getMessage());
          // expecting error!
-         assertTrue("Error message expected  '"+expectError+"' - was:"+e.getMessage(), e.getMessage().contains(expectError));
+         assertTrue("Error message expected  '" + expectError + "' - was:" + e.getMessage(), e.getMessage().contains(expectError));
          return;
       }
       fail("Expected compile error.");
@@ -739,7 +732,7 @@ public class TestPrograms {
       success &= helper.testOutput(fileName, ".sym", program.getScope().getSymbolTableContents(program));
       success &= helper.testOutput(fileName, ".cfg", program.getGraph().toString(program));
       success &= helper.testOutput(fileName, ".log", program.getLog().toString());
-      if (!success) {
+      if(!success) {
          //System.out.println("\nCOMPILE LOG");
          //System.out.println(program.getLog().toString());
          fail("Output does not match reference!");
@@ -755,8 +748,8 @@ public class TestPrograms {
       System.setOut(new PrintStream(kickAssOut));
       int asmRes = KickAssembler.main2(new String[]{asmFile.getAbsolutePath(), "-log", asmLogFile.getAbsolutePath(), "-o", asmPrgFile.getAbsolutePath(), "-vicesymbols", "-showmem"});
       System.setOut(new PrintStream(new FileOutputStream(FileDescriptor.out)));
-      if(asmRes!=0) {
-         fail("KickAssembling file failed! "+kickAssOut.toString());
+      if(asmRes != 0) {
+         fail("KickAssembling file failed! " + kickAssOut.toString());
       }
    }
 
@@ -787,5 +780,4 @@ public class TestPrograms {
    }
 
 
-
 }
\ No newline at end of file