--- a/drivers/net/wireless/libertas_tf/cmd.c
+++ b/drivers/net/wireless/libertas_tf/cmd.c
@@ -7,8 +7,10 @@
  *  the Free Software Foundation; either version 2 of the License, or (at
  *  your option) any later version.
  */
+#undef pr_fmt
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#include <linux/printk.h>
 #include <linux/hardirq.h>
 #include <linux/slab.h>
 #include <linux/export.h>