diff --git a/drivers/net/wireless/b43/main.c b/drivers/net/wireless/b43/main.c
index 64c154d080d865fdde6a792e7ea5008af459a25b..6faa57a2242e74225a41689e0d5c439643ef1da2 100644
--- a/drivers/net/wireless/b43/main.c
+++ b/drivers/net/wireless/b43/main.c
@@ -38,6 +38,7 @@
 #include <linux/wireless.h>
 #include <linux/workqueue.h>
 #include <linux/skbuff.h>
+#include <linux/io.h>
 #include <linux/dma-mapping.h>
 #include <asm/unaligned.h>