diff --git a/conv_cmap.py b/conv_cmap.py
index ef9830d..d8a8022 100755
--- a/conv_cmap.py
+++ b/conv_cmap.py
@@ -24,6 +24,7 @@ def convert_cmap(files, cmapdir, cdbcmapdir, force=False):
   from cmap import CMapDB
   CMapDB.initialize(cmapdir)
   for fname in files:
+    if fname.endswith('.upr'): continue
     cmapname = os.path.basename(fname)
     cdbname = os.path.join(cdbcmapdir, cmapname+'.cmap.cdb')
     if not force and os.path.exists(cdbname):