1 files changed, 1 insertions, 0 deletions

diff --git a/op.c b/op.c
index ca6d44525b..b86227b112 100644
--- a/op.c
+++ b/op.c
@@ -2508,6 +2508,7 @@ I32 flags;
 OP *left;
 OP *right;
 {
+    dTHR;
     CONDOP *condop;
     OP *flip;
     OP *flop;