diff --git a/tests/ogg_test.c b/tests/ogg_test.c
index 83c9bb14..7d65d856 100644
--- a/tests/ogg_test.c
+++ b/tests/ogg_test.c
@@ -21,6 +21,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <unistd.h>
 
 #include <math.h>