diff --git a/Source/JavaScriptCore/llint/LowLevelInterpreter.asm b/Source/JavaScriptCore/llint/LowLevelInterpreter.asm
index af53fe269664..237fd6aab9c8 100644
--- a/Source/JavaScriptCore/llint/LowLevelInterpreter.asm
+++ b/Source/JavaScriptCore/llint/LowLevelInterpreter.asm
@@ -2958,6 +2958,13 @@ _wasm_ipint_call_return_location_wide16:
 _wasm_ipint_call_return_location_wide32:
     crash()
 
+if C_LOOP and not JSVALUE64
+_op_instanceof_return_location:
+_op_instanceof_return_location_wide16:
+_op_instanceof_return_location_wide32:
+    crash()
+end
+
 end # WEBASSEMBLY
 
 include? LowLevelInterpreterAdditions