diff --git a/drivers/watchdog/cdns_wdt.c b/drivers/watchdog/cdns_wdt.c
index 6a608b6..13952e1 100644
--- a/drivers/watchdog/cdns_wdt.c
+++ b/drivers/watchdog/cdns_wdt.c
@@ -11,6 +11,7 @@
 #include <wdt.h>
 #include <clk.h>
 #include <div64.h>
+#include <linux/err.h>
 #include <linux/io.h>
 
 DECLARE_GLOBAL_DATA_PTR;