diff --git a/test_problems/surfkin/surfdemo.cpp b/test_problems/surfkin/surfdemo.cpp
index 23dfc110c..4e4a192ba 100644
--- a/test_problems/surfkin/surfdemo.cpp
+++ b/test_problems/surfkin/surfdemo.cpp
@@ -36,6 +36,6 @@ int main() {
     catch (CanteraError) {
         showErrors(cout);
     }
-
+    return 0;
 }