diff --git a/src/lsm_btree.hrl b/src/lsm_btree.hrl
index 2fd2ca1..0de4845 100644
--- a/src/lsm_btree.hrl
+++ b/src/lsm_btree.hrl
@@ -46,14 +46,4 @@
              (Key <  Range#btree_range.to_key)))).
 
 -define(KEY_IN_RANGE(Key,Range),
-        ((Range#btree_range.from_inclusive andalso
-          (Range#btree_range.from_key =< Key))
-         orelse
-           (Range#btree_range.from_key < Key))
-        andalso
-        ((Range#btree_range.to_key == undefined)
-         orelse
-         ((Range#btree_range.to_inclusive andalso
-             (Key =< Range#btree_range.to_key))
-          orelse
-             (Key <  Range#btree_range.to_key)))).
+        (?KEY_IN_FROM_RANGE(Key,Range) andalso ?KEY_IN_TO_RANGE(Key,Range))).