diff --git a/src/videopreview.cpp b/src/videopreview.cpp
index 831bdd0..85e2b34 100644
--- a/src/videopreview.cpp
+++ b/src/videopreview.cpp
@@ -40,6 +40,7 @@
 #include <ntqfileinfo.h>
 
 #include <cstdlib>
+#include <unistd.h>
 
 #include "mplayerthumbs.h"