diff --git a/pyerrors/input/sfcf.py b/pyerrors/input/sfcf.py
index f069d2bf..7ec26f03 100644
--- a/pyerrors/input/sfcf.py
+++ b/pyerrors/input/sfcf.py
@@ -210,7 +210,7 @@ def read_sfcf(path, prefix, name, quarks='.*', corr_type='bi', noffset=0, wf=0,
             for exc in ls:
                 if not fnmatch.fnmatch(exc, prefix + '*.' + name):
                     ls = list(set(ls) - set([exc]))
-            ls.sort(key=lambda x: int(re.findall(r'\d+', x)[-1]))
+            ls = sort_names(ls)
         pattern = _make_pattern(version, name, noffset, wf, wf2, b2b, quarks)
         deltas = []
         for rep, file in enumerate(ls):