diff --git a/drivers/ntb/ntb_hw.c b/drivers/ntb/ntb_hw.c
index 4c71b17..0b46fef 100644
--- a/drivers/ntb/ntb_hw.c
+++ b/drivers/ntb/ntb_hw.c
@@ -45,6 +45,7 @@
  * Contact Information:
  * Jon Mason <jon.mason@intel.com>
  */
+#include <asm-generic/io-64-nonatomic-hi-lo.h>
 #include <linux/debugfs.h>
 #include <linux/init.h>
 #include <linux/interrupt.h>