diff --git a/examples/hello_sessions_c.c b/examples/hello_sessions_c.c
index 50610e5f430..8d84c39ba6b 100644
--- a/examples/hello_sessions_c.c
+++ b/examples/hello_sessions_c.c
@@ -17,4 +17,5 @@ int main(int argc, char** argv) {
   MPI_Session_init(MPI_INFO_NULL, MPI_ERRORS_RETURN, &s2);
   MPI_Session_finalize(&s2);
   MPI_Info_free(&info);
+  return 0;
 }