diff --git a/libreoffice.spec b/libreoffice.spec
index 62ec9c3..8ba7ebf 100644
--- a/libreoffice.spec
+++ b/libreoffice.spec
@@ -51,6 +51,11 @@ License:        (MPLv1.1 or LGPLv3+) and LGPLv3 and LGPLv2+ and BSD and (MPLv1.1
 Group:          Applications/Productivity
 URL:            http://www.libreoffice.org/
 
+%if 0%{?rhel} && 0%{?rhel} >= 7
+# improve build time by only building for platforms libreoffice is shipped for
+ExcludeArch:    %{ix86} ppc ppc64 s390 s390x
+%endif
+
 Source0:        %{source_url}/libreoffice-%{version}%{?libo_prerelease}.tar.xz
 Source1:        %{source_url}/libreoffice-help-%{version}%{?libo_prerelease}.tar.xz
 Source2:        %{source_url}/libreoffice-translations-%{version}%{?libo_prerelease}.tar.xz