diff --git a/include/linux/idr.h b/include/linux/idr.h
index 7c3a365f7e127ac29cfedc6b5debe81eb87abe74..fa14f834e4ede3a81e7e6182c889fec338b2495f 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -15,6 +15,7 @@
 #include <linux/radix-tree.h>
 #include <linux/gfp.h>
 #include <linux/percpu.h>
+#include <linux/bug.h>
 
 struct idr {
 	struct radix_tree_root	idr_rt;