diff --git a/src/blocks/scratch3_procedures.js b/src/blocks/scratch3_procedures.js
index 1f0cdf03..586c1462 100644
--- a/src/blocks/scratch3_procedures.js
+++ b/src/blocks/scratch3_procedures.js
@@ -75,8 +75,11 @@ class Scratch3ProcedureBlocks {
             // tw: is compiled? and is turbowarp? should return true
             // Yes, is compiled? is returning a technically incorrect value.
             // This results in the least astonishment for users when they click on "is compiled?" on its own.
-            if (`${args.VALUE}`.toLowerCase() === 'is compiled?' || `${args.VALUE}`.toLowerCase() === 'is turbowarp?') {
-                return true;
+            if (util.target.runtime.compilerOptions.enabled) {
+                const lowercaseValue = `${args.VALUE}`.toLowerCase();
+                if (lowercaseValue === 'is compiled?' || lowercaseValue === 'is turbowarp?') {
+                    return true;
+                }
             }
             // When the parameter is not found in the most recent procedure
             // call, the default is always 0.