diff --git a/lib/radix-tree.c b/lib/radix-tree.c
index 3291a8e37490ecc9d9221f389d26d02c0ae1f103..3d2aa27b845b53f9e281e7bf5b7a080fd24c5bbb 100644
--- a/lib/radix-tree.c
+++ b/lib/radix-tree.c
@@ -33,7 +33,7 @@
 #include <linux/string.h>
 #include <linux/bitops.h>
 #include <linux/rcupdate.h>
-#include <linux/hardirq.h>		/* in_interrupt() */
+#include <linux/preempt_mask.h>		/* in_interrupt() */
 
 
 /*