diff --git a/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp b/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp
index 651f5c9..1d9636e 100644
--- a/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp
+++ b/tools/clang-fuzzer/ExampleClangProtoFuzzer.cpp
@@ -23,5 +23,5 @@
 
 DEFINE_BINARY_PROTO_FUZZER(const Function& input) {
   auto S = FunctionToString(input);
-  HandleCXX(S, GetCLArgs());
+  HandleCXX(S, "./test.cc", GetCLArgs());
 }