diff --git a/front_end/object_ui/JavaScriptAutocomplete.js b/front_end/object_ui/JavaScriptAutocomplete.js
index 7c94188250..c4509c4fba 100644
--- a/front_end/object_ui/JavaScriptAutocomplete.js
+++ b/front_end/object_ui/JavaScriptAutocomplete.js
@@ -674,7 +674,7 @@ export class JavaScriptAutocomplete {
     }
     const result =
         await currentExecutionContext.runtimeModel.compileScript(expression, '', false, currentExecutionContext.id);
-    if (!result.exceptionDetails) {
+    if (!result || !result.exceptionDetails) {
       return true;
     }
     const description = result.exceptionDetails.exception.description;