diff --git a/Storage/MassStorage/Encodings/MacintoshVolume.cpp b/Storage/MassStorage/Encodings/MacintoshVolume.cpp
index 2d8b64cdb..a8eb6d9cb 100644
--- a/Storage/MassStorage/Encodings/MacintoshVolume.cpp
+++ b/Storage/MassStorage/Encodings/MacintoshVolume.cpp
@@ -9,6 +9,7 @@
 #include "MacintoshVolume.hpp"
 
 #include <sys/types.h>
+#include <unistd.h>
 #include <cstring>
 
 using namespace Storage::MassStorage::Encodings::Macintosh;