1 files changed, 1 insertions, 1 deletions
diff --git a/process.c b/process.c
index ac0ec0605..ed84d516a 100644
--- a/process.c
+++ b/process.c
@@ -973,7 +973,7 @@ void rb_thread_reset_timer_thread(void);
 static int forked_child = 0;
 
 #define before_exec() \
-  (rb_enable_interrupt(), forked_child ? 0 : rb_thread_stop_timer_thread())
+    (rb_enable_interrupt(), (forked_child ? 0 : (rb_thread_stop_timer_thread(), 1)))
 #define after_exec() \
   (rb_thread_reset_timer_thread(), rb_thread_start_timer_thread(), forked_child = 0, rb_disable_interrupt())
 #define before_fork() before_exec()