--- a/drivers/net/wireless/ath/carl9170/debug.c
+++ b/drivers/net/wireless/ath/carl9170/debug.c
@@ -38,6 +38,7 @@
  */
 
 #include <linux/seq_file.h>
+#include <linux/vmalloc.h>
 #include "carl9170.h"
 #include "usb.h"
 #include "cmd.h"