diff --git a/fontconfig.spec b/fontconfig.spec
index cfe66ac..834a6c5 100644
--- a/fontconfig.spec
+++ b/fontconfig.spec
@@ -32,7 +32,13 @@ Source5:        local.conf
 Patch1:         fontconfig-locale_c.utf8.patch
 BuildRequires:  automake >= 1.11
 BuildRequires:  freetype2-devel
+# -----
+# (see removal of src/fcobjshash.h in %build)
+# build 2.12.3 (2.12.1 worked fine); not needed as soon
+# as following bug is resolved:
+# https://bugs.freedesktop.org/show_bug.cgi?id=101280
 BuildRequires:  gperf
+# ---
 BuildRequires:  libexpat-devel
 BuildRequires:  libtool
 BuildRequires:  pkgconfig