diff --git a/master/ioctl.c b/master/ioctl.c
index 24122f80..5709a5a6 100644
--- a/master/ioctl.c
+++ b/master/ioctl.c
@@ -35,6 +35,7 @@
 /*****************************************************************************/
 
 #include <linux/module.h>
+#include <linux/vmalloc.h>
 
 #include "master.h"
 #include "slave_config.h"