diff --git a/src/lib.c b/src/lib.c
index 6a07d1d..424d921 100644
--- a/src/lib.c
+++ b/src/lib.c
@@ -2,6 +2,7 @@
 #include "rds.h"
 #include <time.h>
 
+extern int nanosleep(const struct timespec *req, struct timespec *rem);
 /* millisecond sleep */
 void msleep(unsigned long ms) {
 	struct timespec ts;