diff --git a/compiler/src/prog8/compiler/astprocessing/AstChecker.kt b/compiler/src/prog8/compiler/astprocessing/AstChecker.kt
index 9342d4cc8..9d01593a9 100644
--- a/compiler/src/prog8/compiler/astprocessing/AstChecker.kt
+++ b/compiler/src/prog8/compiler/astprocessing/AstChecker.kt
@@ -958,11 +958,7 @@ internal class AstChecker(private val program: Program,
             }
         }
 
-        if(expr.operator in ComparisonOperators) {
-            if(leftDt!=rightDt && !(leftDt in ByteDatatypes && rightDt in ByteDatatypes)) {
-                throw FatalAstException("got comparison with different operand types: $leftDt ${expr.operator} $rightDt  ${expr.position}")
-            }
-        } else  {
+        if(expr.operator !in ComparisonOperators) {
             if (leftDt == DataType.STR && rightDt == DataType.STR || leftDt in ArrayDatatypes && rightDt in ArrayDatatypes) {
                 // str+str  and  str*number have already been const evaluated before we get here.
                 errors.err("no computational or logical expressions with strings or arrays are possible", expr.position)