diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 6ce3c7c..65fe1dc0 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -1144,6 +1144,9 @@
 	unsigned long s_ext_blocks;
 	unsigned long s_ext_extents;
 #endif
+	/* ext4 extent cache stats */
+	unsigned long extent_cache_hits;
+	unsigned long extent_cache_misses;
 
 	/* for buddy allocator */
 	struct ext4_group_info ***s_group_info;