diff -rupN a/src/solid/devices/backends/udisks2/udisksblock.h b/src/solid/devices/backends/udisks2/udisksblock.h
--- a/src/solid/devices/backends/udisks2/udisksblock.h	2017-07-08 23:10:36.048041917 -0500
+++ b/src/solid/devices/backends/udisks2/udisksblock.h	2017-07-08 23:12:32.716620481 -0500
@@ -22,6 +22,7 @@
 #define UDISKS2BLOCK_H
 
 #include <solid/devices/ifaces/block.h>
+#include <sys/types.h>
 #include "udisksdeviceinterface.h"
 
 #ifdef Q_OS_FREEBSD