diff --git a/src/timer.c b/src/timer.c
index 4525199dd..7cfca3b1f 100644
--- a/src/timer.c
+++ b/src/timer.c
@@ -22,7 +22,6 @@
 #include "uv-common.h"
 #include "heap-inl.h"
 
-#include <assert.h>
 #include <limits.h>