diff --git a/pkg/dev_compiler/tool/ddb b/pkg/dev_compiler/tool/ddb
index 824db4832692..c7cd1caa938b 100755
--- a/pkg/dev_compiler/tool/ddb
+++ b/pkg/dev_compiler/tool/ddb
@@ -347,7 +347,7 @@ try {
   if ($nnbd) {
     dart.nullSafety($soundNullSafety);
     dart.weakNullSafetyWarnings(!$soundNullSafety);
-    sdk.dart.nonNullAsserts($nonNullAsserts);
+    dart.nonNullAsserts($nonNullAsserts);
   }
   _isolate_helper.startRootIsolate(() => {}, []);
   main();