diff --git a/lib/thread.c b/lib/thread.c
index 9c3ee82..cb51332 100644
--- a/lib/thread.c
+++ b/lib/thread.c
@@ -102,7 +102,7 @@
 	  ? a.tv_usec - b.tv_usec : a.tv_sec - b.tv_sec);
 }
 
-static unsigned long
+unsigned long
 timeval_elapsed (struct timeval a, struct timeval b)
 {
   return (((a.tv_sec - b.tv_sec) * TIMER_SECOND_MICRO)