diff --git a/tools/js2c.py b/tools/js2c.py
index 788b2e74d24..e1d617dd274 100755
--- a/tools/js2c.py
+++ b/tools/js2c.py
@@ -431,7 +431,7 @@ def PrepareSources(source_files, native_type, emit_js):
   # It cannot be empty (or whitespace, which gets trimmed to empty), as
   # the deserialization code assumes each file is nonempty.
   if not source_files_and_contents:
-    source_files_and_contents = [("dummy.js", "void 0;")]
+    source_files_and_contents = [("dummy.js", "(function() {})")]
 
   result = Sources()