diff --git a/src/lsm_btree.erl b/src/lsm_btree.erl
index dcb3925..03323d3 100644
--- a/src/lsm_btree.erl
+++ b/src/lsm_btree.erl
@@ -22,7 +22,8 @@ close(Ref) ->
     try
         gen_server:call(Ref, close)
     catch
-        exit:{noproc,_} -> ok
+        exit:{noproc,_} -> ok;
+        exit:noproc -> ok
     end.
 
 
diff --git a/src/lsm_btree_level.erl b/src/lsm_btree_level.erl
index f2a719f..f25ab13 100644
--- a/src/lsm_btree_level.erl
+++ b/src/lsm_btree_level.erl
@@ -44,7 +44,8 @@ close(Ref) ->
     try
         call(Ref, close)
     catch
-        exit:{noproc,_} -> ok
+        exit:{noproc,_} -> ok;
+        exit:noproc -> ok
     end.