diff --git a/src/dissect/dissect.c b/src/dissect/dissect.c
index 9eef624861..ff9eabb600 100644
--- a/src/dissect/dissect.c
+++ b/src/dissect/dissect.c
@@ -6,6 +6,7 @@
 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/file.h>
+#include <unistd.h>
 
 #include "sd-device.h"