diff --git a/Modules/main.c b/Modules/main.c
index 19c3e1d..427b19b 100644
--- a/Modules/main.c
+++ b/Modules/main.c
@@ -205,7 +205,7 @@
   	}
 
 	if (Py_VerboseFlag ||
-	    command == NULL && filename == NULL && stdin_is_interactive)
+	    (command == NULL && filename == NULL && stdin_is_interactive))
 		fprintf(stderr, "Python %s\n%s\n",
 			Py_GetVersion(), Py_GetCopyright());