diff --git a/planet/splice.py b/planet/splice.py
index e50f927..4853619 100644
--- a/planet/splice.py
+++ b/planet/splice.py
@@ -68,8 +68,8 @@ def splice():
     # insert entry information
     items = 0
     for mtime,file in dir:
-        if index:
-            base = file.split('/')[-1]
+        if index != None:
+            base = os.path.basename(file)
             if index.has_key(base) and index[base] not in sub_ids: continue
 
         try: