diff --git a/Mesa.changes b/Mesa.changes
index 8611d5e..7345189 100644
--- a/Mesa.changes
+++ b/Mesa.changes
@@ -1,3 +1,11 @@
+-------------------------------------------------------------------
+Fri Sep  1 10:31:27 UTC 2023 - Stefan Dirsch <sndirsch@suse.com>
+
+- mini-cleanup for python package BuildRequires in specfile
+- added python3-dataclasses package for sle15/Leap15 to finally fix
+  build for these build targets; dataclasses module is in standard
+  library of python >= 3.7 ...
+
 -------------------------------------------------------------------
 Thu Aug 17 08:35:12 UTC 2023 - Bjørn Lie <bjorn.lie@gmail.com>
 
diff --git a/Mesa.spec b/Mesa.spec
index c52e978..f58ccd2 100644
--- a/Mesa.spec
+++ b/Mesa.spec
@@ -163,11 +163,11 @@ BuildRequires:  memory-constraints
 BuildRequires:  meson
 BuildRequires:  pkgconfig
 BuildRequires:  python3-base
-%if 0%{?suse_version} > 1320
-BuildRequires:  python3-mako
-%else
-BuildRequires:  python3-Mako
+# dataclasses is in standard library of python >= 3.7
+%if 0%{?suse_version} < 1550
+BuildRequires:  python3-dataclasses
 %endif
+BuildRequires:  python3-Mako
 BuildRequires:  python3-xml
 BuildRequires:  pkgconfig(dri2proto)
 BuildRequires:  pkgconfig(dri3proto)