diff --git a/tests/namedb.c b/tests/namedb.c
index f008a5be924fa17f39ba92aac8eb6d3dcd2d20c2..67a61f517fc2731d36be9d33567f311f7a30f143 100644
--- a/tests/namedb.c
+++ b/tests/namedb.c
@@ -16,6 +16,7 @@
 
 #include <string.h>
 #include <time.h>
+#include <unistd.h>
 #include <tap/basic.h>
 
 #include "libknot/common.h"