diff --git a/osdep/threads.c b/osdep/threads.c
index 6ef08dbf49..4f5b39d504 100644
--- a/osdep/threads.c
+++ b/osdep/threads.c
@@ -16,6 +16,7 @@
  */
 #include <stdio.h>
 #include <errno.h>
+#include <pthread.h>
 
 #include "config.h"