diff --git a/drivers/char/ramoops.c b/drivers/char/ramoops.c
index 810aff9e750fde8e28a16d6a81866c72a6dc5aa2..7c7f42a1f880cc81af6dafd89b73810c7eca34aa 100644
--- a/drivers/char/ramoops.c
+++ b/drivers/char/ramoops.c
@@ -26,6 +26,7 @@
 #include <linux/module.h>
 #include <linux/kmsg_dump.h>
 #include <linux/time.h>
+#include <linux/err.h>
 #include <linux/io.h>
 #include <linux/ioport.h>
 #include <linux/platform_device.h>