diff --git a/src/main/java/dk/camelot64/kickc/model/symbols/Procedure.java b/src/main/java/dk/camelot64/kickc/model/symbols/Procedure.java
index 1398823b8..c1f92501c 100644
--- a/src/main/java/dk/camelot64/kickc/model/symbols/Procedure.java
+++ b/src/main/java/dk/camelot64/kickc/model/symbols/Procedure.java
@@ -44,11 +44,7 @@ public class Procedure extends Scope {
 
    /** The names of all legal intrinsic procedures. */
    final public static List<String> INTRINSIC_PROCEDURES = Arrays.asList(
-         Pass1PrintfIntrinsicRewrite.INTRINSIC_PRINTF_NAME,
-         Pass1ByteXIntrinsicRewrite.INTRINSIC_BYTE0_NAME,
-         Pass1ByteXIntrinsicRewrite.INTRINSIC_BYTE1_NAME,
-         Pass1ByteXIntrinsicRewrite.INTRINSIC_BYTE2_NAME,
-         Pass1ByteXIntrinsicRewrite.INTRINSIC_BYTE3_NAME
+         Pass1PrintfIntrinsicRewrite.INTRINSIC_PRINTF_NAME
    );
 
    /** The method for passing parameters and return value to the procedure. */