diff --git a/ROMS_example.nc.md5 b/ROMS_example.nc.md5
index 9ff4859..3a27f67 100644
--- a/ROMS_example.nc.md5
+++ b/ROMS_example.nc.md5
@@ -1 +1 @@
-1f65e1ebcf8fb321e5f1ebd1471b7c02
+1f65e1ebcf8fb321e5f1ebd1471b7c02
\ No newline at end of file
diff --git a/make_check_sums.py b/make_check_sums.py
index c4aaf70..218da44 100644
--- a/make_check_sums.py
+++ b/make_check_sums.py
@@ -8,8 +8,7 @@
 def main():
     files = glob.glob('*.nc')
     for ncf in files:
-        prefix = ncf.split('.')[0]
-        outf = '{}.md5'.format(prefix)
+        outf = '{}.md5'.format(ncf)
         with open(outf, 'w') as f:
             f.write(file_md5_checksum(ncf))