diff --git a/graphviz-addons.changes b/graphviz-addons.changes
index 2848a60..3e70099 100644
--- a/graphviz-addons.changes
+++ b/graphviz-addons.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu Oct 25 14:52:00 UTC 2018 - trenn@suse.de
+
+- Build with gts support (bsc#1108978, bsc#1108976)
+  SLE12 flavors do not provide gts, so explicitly exclude
+  gts support there.
+
 -------------------------------------------------------------------
 Mon Jul 30 11:24:20 UTC 2018 - bwiedemann@suse.com
 
diff --git a/graphviz-addons.spec b/graphviz-addons.spec
index 49b6267..6b640c5 100644
--- a/graphviz-addons.spec
+++ b/graphviz-addons.spec
@@ -32,6 +32,12 @@
 %else
 %define php_version 5
 %endif
+# No pkgconfig(gts) in sle12 GA or SPx, but in sle15
+%if 0%{?suse_version} == 1315 && !0%{?is_opensuse}
+%define sle12 1
+%else
+%define sle12 0
+%endif
 Name:           graphviz-addons
 Version:        2.40.1
 Release:        0
@@ -64,6 +70,9 @@ BuildRequires:  libstdc++-devel
 BuildRequires:  libtool
 BuildRequires:  pkgconfig
 BuildRequires:  pkgconfig(expat)
+%if 0%{sle12} != 1
+BuildRequires:  pkgconfig(gts)
+%endif
 BuildRequires:  pkgconfig(zlib)
 Requires:       graphviz-plugins-core = %{version}
 Recommends:     graphviz-gd = %{version}
@@ -90,7 +99,6 @@ BuildRequires:  pkgconfig(gdlib)
 BuildRequires:  pkgconfig(glib-2.0)
 BuildRequires:  pkgconfig(glu)
 BuildRequires:  pkgconfig(gtkglext-1.0)
-BuildRequires:  pkgconfig(gts)
 BuildRequires:  pkgconfig(ice)
 BuildRequires:  pkgconfig(sm)
 BuildRequires:  pkgconfig(x11)
diff --git a/graphviz.changes b/graphviz.changes
index 2848a60..3e70099 100644
--- a/graphviz.changes
+++ b/graphviz.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu Oct 25 14:52:00 UTC 2018 - trenn@suse.de
+
+- Build with gts support (bsc#1108978, bsc#1108976)
+  SLE12 flavors do not provide gts, so explicitly exclude
+  gts support there.
+
 -------------------------------------------------------------------
 Mon Jul 30 11:24:20 UTC 2018 - bwiedemann@suse.com
 
diff --git a/graphviz.spec b/graphviz.spec
index c537ee2..74c7452 100644
--- a/graphviz.spec
+++ b/graphviz.spec
@@ -32,6 +32,12 @@
 %else
 %define php_version 5
 %endif
+# No pkgconfig(gts) in sle12 GA or SPx, but in sle15
+%if 0%{?suse_version} == 1315 && !0%{?is_opensuse}
+%define sle12 1
+%else
+%define sle12 0
+%endif
 Name:           graphviz
 Version:        2.40.1
 Release:        0
@@ -64,6 +70,9 @@ BuildRequires:  libstdc++-devel
 BuildRequires:  libtool
 BuildRequires:  pkgconfig
 BuildRequires:  pkgconfig(expat)
+%if 0%{sle12} != 1
+BuildRequires:  pkgconfig(gts)
+%endif
 BuildRequires:  pkgconfig(zlib)
 Requires:       graphviz-plugins-core = %{version}
 Recommends:     graphviz-gd = %{version}
@@ -90,7 +99,6 @@ BuildRequires:  pkgconfig(gdlib)
 BuildRequires:  pkgconfig(glib-2.0)
 BuildRequires:  pkgconfig(glu)
 BuildRequires:  pkgconfig(gtkglext-1.0)
-BuildRequires:  pkgconfig(gts)
 BuildRequires:  pkgconfig(ice)
 BuildRequires:  pkgconfig(sm)
 BuildRequires:  pkgconfig(x11)
diff --git a/pre_checkin.sh b/pre_checkin.sh
index d20c455..9eb5b10 100644
--- a/pre_checkin.sh
+++ b/pre_checkin.sh
@@ -3,4 +3,5 @@ cp graphviz.changes graphviz-addons.changes
 sed \
     -e 's:%bcond_with extras:%bcond_without extras:' \
     -e 's#Name:           graphviz#Name:           graphviz-addons#' \
+    -e 's#spec file for package graphviz#spec file for package graphviz-addons#' \
     graphviz.spec > graphviz-addons.spec