diff --git a/jc/parsers/hashsum.py b/jc/parsers/hashsum.py
index 187185e9..da01b36c 100644
--- a/jc/parsers/hashsum.py
+++ b/jc/parsers/hashsum.py
@@ -140,7 +140,8 @@ def parse(data, raw=False, quiet=False):
                 file_mode = ""
             # standard md5sum and shasum command output
             else:
-                if not (m:= re.match('(\S+) ([ ?*])(.*)$', line)):
+                m = re.match('[0-9a-f]+ ([ ?*])(.*)$', line)
+                if not m:
                     raise ValueError(f'Invalid line format: "{line}"')
                 file_hash, file_mode, file_name = m.groups()