diff --git a/fs/ext3/balloc.c b/fs/ext3/balloc.c
index 161da2d..a177122 100644
--- a/fs/ext3/balloc.c
+++ b/fs/ext3/balloc.c
@@ -14,6 +14,7 @@
 #include <linux/time.h>
 #include <linux/capability.h>
 #include <linux/fs.h>
+#include <linux/slab.h>
 #include <linux/jbd.h>
 #include <linux/ext3_fs.h>
 #include <linux/ext3_jbd.h>