diff --git a/drivers/misc/lkdtm.c b/drivers/misc/lkdtm.c
index d30301149242c92cefdf5532e3cce52be397407e..d66a2f24f6b3dceffbcc3335d502e858520558e2 100644
--- a/drivers/misc/lkdtm.c
+++ b/drivers/misc/lkdtm.c
@@ -46,6 +46,7 @@
 #include <linux/debugfs.h>
 #include <linux/vmalloc.h>
 #include <linux/mman.h>
+#include <asm/cacheflush.h>
 
 #ifdef CONFIG_IDE
 #include <linux/ide.h>