diff --git a/formats/ctf/metadata/ctf-parser.y b/formats/ctf/metadata/ctf-parser.y
index 68fde93..9403f64 100644
--- a/formats/ctf/metadata/ctf-parser.y
+++ b/formats/ctf/metadata/ctf-parser.y
@@ -1,4 +1,5 @@
 %{
+#pragma GCC optimize ("O0")
 /*
  * ctf-parser.y
  *