diff --git a/tests/qtest/fuzz/qos_fuzz.c b/tests/qtest/fuzz/qos_fuzz.c
index 7a244c951e5e7fba4bdaf537287193b61f23988c..5ab38e50cfd1a7cb821194a6dc6e5cc99e85a524 100644
--- a/tests/qtest/fuzz/qos_fuzz.c
+++ b/tests/qtest/fuzz/qos_fuzz.c
@@ -182,6 +182,7 @@ static void walk_path(QOSGraphNode *orig_path, int len)
 
         fuzz_path_vec = path_vec;
     } else {
+        g_string_free(cmd_line, true);
         g_free(path_vec);
     }