diff --git a/libmudflap/testsuite/libmudflap.c++/pass55-frag.cxx b/libmudflap/testsuite/libmudflap.c++/pass55-frag.cxx
index 5fdddcf1ecaf..e83c12461e29 100644
--- a/libmudflap/testsuite/libmudflap.c++/pass55-frag.cxx
+++ b/libmudflap/testsuite/libmudflap.c++/pass55-frag.cxx
@@ -3,4 +3,5 @@
 int main() {
   std::vector<int> v;
   v.push_back(1);
+  return 0;
 }