1 files changed, 2 insertions, 1 deletions
diff --git a/thread.c b/thread.c
index adaaa8ebee..da4cf9cf30 100644
--- a/thread.c
+++ b/thread.c
@@ -4011,7 +4011,8 @@ VALUE
 ruby_suppress_tracing(VALUE (*func)(VALUE, int), VALUE arg, int always)
 {
     rb_thread_t *th = GET_THREAD();
-    int state, raised, tracing;
+    int state, tracing;
+    volatile int raised;
     VALUE result = Qnil;
 
     if ((tracing = th->tracing) != 0 && !always) {