signal.c: follow up r63435

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@63436 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 1 deletions

diff --git a/signal.c b/signal.c
index 5803f8f0b9..c781c38c62 100644
--- a/signal.c
+++ b/signal.c
@@ -1012,7 +1012,7 @@ static void
 signal_exec(VALUE cmd, int safe, int sig)
 {
     rb_execution_context_t *ec = GET_EC();
-    volatile unsigned long old_interrupt_mask = ec->interrupt_mask;
+    volatile rb_atomic_t old_interrupt_mask = ec->interrupt_mask;
     enum ruby_tag_type state;
 
     /*