diff --git a/include/linux/printk.h b/include/linux/printk.h
index aa3c66d..1bec2f7 100644
--- a/include/linux/printk.h
+++ b/include/linux/printk.h
@@ -300,6 +300,8 @@
 	no_printk(KERN_DEBUG pr_fmt(fmt), ##__VA_ARGS__)
 #endif
 
+extern const struct file_operations kmsg_fops;
+
 enum {
 	DUMP_PREFIX_NONE,
 	DUMP_PREFIX_ADDRESS,