diff --git a/pym/cl_builder.py b/pym/cl_builder.py
index ac2b774..f0bf9c5 100644
--- a/pym/cl_builder.py
+++ b/pym/cl_builder.py
@@ -657,7 +657,7 @@ class cl_builder(color_print):
             open(digestfile,'w').writelines(map(lambda x:template%{
                 'alg':x.upper(),
                 'digest': \
-                    process("%ssum",filename).read().partition(' ')[0],
+                    process("%ssum"%x,filename).read().partition(' ')[0],
                 'filename':path.basename(filename)},["md5","sha1"]))
         except:
             return False