diff --git a/switchtec.c b/switchtec.c
index cd5534e..42cca5f 100644
--- a/switchtec.c
+++ b/switchtec.c
@@ -22,7 +22,7 @@
 #include <linux/uaccess.h>
 #include <linux/poll.h>
 #include <linux/wait.h>
-
+#include <linux/io-64-nonatomic-lo-hi.h>
 #include <linux/nospec.h>
 
 #include "version.h"