1 files changed, 2 insertions, 0 deletions
diff --git a/process.c b/process.c
index bcd41a5f2a..f87041e3a2 100644
--- a/process.c
+++ b/process.c
@@ -898,6 +898,8 @@ proc_detach(VALUE obj, VALUE pid)
 char *strtok();
 #endif
 
+void rb_thread_stop_timer_thread(void);
+
 #define before_exec() \
   (rb_enable_interrupt(), rb_thread_stop_timer_thread())
 #define after_exec() \