diff --git a/drivers/base/firmware_class.c b/drivers/base/firmware_class.c
index ac7e32fac8fc..ceab749b1790 100644
--- a/drivers/base/firmware_class.c
+++ b/drivers/base/firmware_class.c
@@ -7,6 +7,8 @@
  *
  */
 
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
 #include <linux/capability.h>
 #include <linux/device.h>
 #include <linux/module.h>