diff --git a/libreoffice.changes b/libreoffice.changes
index e84cfc0..2939ba8 100644
--- a/libreoffice.changes
+++ b/libreoffice.changes
@@ -1,3 +1,8 @@
+-------------------------------------------------------------------
+Mon Mar  4 10:00:18 UTC 2019 - Tomáš Chvátal <tchvatal@suse.com>
+
+- Switch to gcc7 on SLE12
+
 -------------------------------------------------------------------
 Wed Feb 27 10:20:14 UTC 2019 - Tomáš Chvátal <tchvatal@suse.com>
 
diff --git a/libreoffice.spec b/libreoffice.spec
index a67c0c7..0b8937b 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -124,7 +124,6 @@ BuildRequires:  fdupes
 BuildRequires:  flex
 BuildRequires:  flute
 BuildRequires:  fontforge
-BuildRequires:  gcc-c++
 BuildRequires:  glm-devel
 BuildRequires:  graphviz
 # Needed for tests
@@ -260,6 +259,13 @@ Obsoletes:      %{name}-icon-theme-crystal < %{version}
 Provides:       %{name}-icon-theme-oxygen = %{version}
 Obsoletes:      %{name}-icon-theme-oxygen < %{version}
 ExclusiveArch:  aarch64 %{ix86} x86_64
+%if %{?suse_version} >= 1500
+BuildRequires:  gcc >= 7
+BuildRequires:  gcc-c++ >= 7
+%else
+BuildRequires:  gcc7
+BuildRequires:  gcc7-c++
+%endif
 %if 0%{?suse_version} < 1500
 Requires(post): update-desktop-files
 Requires(postun): update-desktop-files
@@ -956,15 +962,14 @@ Provides %{langname} translations and additional resources (help files, etc.) fo
 
 %prep
 %setup -q -b2 -b4
-%if 0%{?suse_version} < 1330
+%if 0%{?suse_version} < 1500
 # The rename of the configdir is needed only on older than factory for compat
 %patch1
-# patch to build with old boost
-%patch5 -p1
 %endif # Leap 42/SLE-12
 %patch2
 %patch3
 %patch4 -p1
+%patch5 -p1
 %patch6 -p1
 %patch990 -p1
 %patch991 -p1
@@ -1008,6 +1013,11 @@ CFLAGS="$ARCH_FLAGS"
 CXXFLAGS="$ARCH_FLAGS"
 export ARCH_FLAGS CFLAGS CXXFLAGS
 
+%if 0%{?suse_version} < 1500
+export CC=gcc-7
+export CXX=g++-7
+%endif
+
 # Colada does not have .pc file and configure creator was really lazy
 export OPENCOLLADA_CFLAGS='-I/usr/include/COLLADABaseUtils -I/usr/include/COLLADAFramework -I/usr/include/COLLADASaxFrameworkLoader -I/usr/include/GeneratedSaxParser'
 export OPENCOLLADA_LIBS='-lOpenCOLLADABaseUtils -lOpenCOLLADAFramework -lOpenCOLLADASaxFrameworkLoader -lGeneratedSaxParser'