diff --git a/ext/vorbis/vorbisenc.c b/ext/vorbis/vorbisenc.c
index fd12a421d4..76fd8cc626 100644
--- a/ext/vorbis/vorbisenc.c
+++ b/ext/vorbis/vorbisenc.c
@@ -20,6 +20,7 @@
 
 #include <stdlib.h>
 #include <string.h>
+#include <time.h>
 #include <vorbis/vorbisenc.h>
 
 #include "vorbisenc.h"