diff --git a/snapper/Snapshot.h b/snapper/Snapshot.h
index 776dabf..ab89fc7 100644
--- a/snapper/Snapshot.h
+++ b/snapper/Snapshot.h
@@ -26,6 +26,7 @@
 
 
 #include <time.h>
+#include <sys/types.h>
 #include <string>
 #include <list>
 #include <map>