diff --git a/rrs/tools/common.py b/rrs/tools/common.py
index f59f1b0..6149792 100644
--- a/rrs/tools/common.py
+++ b/rrs/tools/common.py
@@ -152,7 +152,7 @@ def get_recipe_pv_without_srcpv(pv, uri_type):
             pfx = m.group('pfx')
             sfx = m.group('sfx')
     else:
-        regex = re.compile("(?P<pfx>(v|r|))(?P<ver>((\d+[\.\-_]*)+))")
+        regex = re.compile("(?P<pfx>(v|r|))(?P<ver>((\w+[\.\-_]*)+))")
         m = regex.match(pv)
         if m:
             pv = m.group('ver')