diff --git a/src/asahi/genxml/gen_pack.py b/src/asahi/genxml/gen_pack.py
index 972e97ec9f1..c2dbf987456 100644
--- a/src/asahi/genxml/gen_pack.py
+++ b/src/asahi/genxml/gen_pack.py
@@ -120,7 +120,7 @@ class Field(object):
                 self.default = mod[1]
             elif mod[0] == 'groups':
                 # The zero encoding means "all"
-                self.default = 1 << int(attrs["size"])
+                self.default = (1 << int(attrs["size"])) * mod[1]
             elif mod[0] in ['shr', 'align']:
                 # Zero encodes to zero
                 pass