diff --git a/models/config.yaml b/models/config.yaml
index cb40d65..a6e7d6c 100644
--- a/models/config.yaml
+++ b/models/config.yaml
@@ -22,7 +22,7 @@
   wbits: 5
 .*(-gr32-|-32g-|groupsize32|-32g$):
   groupsize: 32
-.*(-gr64-|-64g-|groupsize64):
+.*(-gr64-|-64g-|groupsize64|-64g$):
   groupsize: 64
 .*(gr128|128g|groupsize128):
   groupsize: 128