diff --git a/docs/cpp/config-linux.md b/docs/cpp/config-linux.md
index d118b1758..32f9127dd 100644
--- a/docs/cpp/config-linux.md
+++ b/docs/cpp/config-linux.md
@@ -88,6 +88,8 @@ int main()
         cout << word << " ";
     }
     cout << endl;
+
+    return 0;
 }
 ```