diff --git a/uncompyle6/main.py b/uncompyle6/main.py
index 3f3c316d..283dc09c 100644
--- a/uncompyle6/main.py
+++ b/uncompyle6/main.py
@@ -118,7 +118,10 @@ def main(in_base, out_base, files, codes, outfile=None,
         elif out_base is None:
             outstream = sys.stdout
         else:
-            outfile = os.path.join(out_base, filename) + '_dis'
+            if filename.endswith('.pyc'):
+                outfile = os.path.join(out_base, filename[0:-1])
+            else:
+                outfile = os.path.join(out_base, filename) + '_dis'
             outstream = _get_outstream(outfile)
         # print(outfile, file=sys.stderr)