diff --git a/tools/lib/lockdep/uinclude/linux/kernel.h b/tools/lib/lockdep/uinclude/linux/kernel.h
index faa98cc7971a..75ff4b1bbcac 100644
--- a/tools/lib/lockdep/uinclude/linux/kernel.h
+++ b/tools/lib/lockdep/uinclude/linux/kernel.h
@@ -6,6 +6,7 @@
 #include <linux/rcu.h>
 #include <linux/hardirq.h>
 #include <linux/kern_levels.h>
+#include <linux/err.h>
 
 #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))