diff --git a/h/m2_traps.h b/h/m2_traps.h
index bbba12046..1647a77e4 100644
--- a/h/m2_traps.h
+++ b/h/m2_traps.h
@@ -3,3 +3,4 @@
 #define M2_NORESULT	66
 #define M2_UOVFL	67
 #define M2_FORCH	68
+#define M2_UUVFL	69