1 files changed, 1 insertions, 1 deletions
diff --git a/test cases/fortran/9 cpp/main.cpp b/test cases/fortran/9 cpp/main.cpp
index a3eeaeca7..534a23aa1 100644
--- a/test cases/fortran/9 cpp/main.cpp
+++ b/test cases/fortran/9 cpp/main.cpp
@@ -2,7 +2,7 @@
 
 extern "C" double fortran();
 
-int main() {
+int main(void) {
     std::cout << "FORTRAN gave us this number: " << fortran() << '\n';
     return 0;
 }