diff --git a/MozillaFirefox-branding-openSUSE.spec b/MozillaFirefox-branding-openSUSE.spec
index 4c003fe..1c4fa82 100644
--- a/MozillaFirefox-branding-openSUSE.spec
+++ b/MozillaFirefox-branding-openSUSE.spec
@@ -23,12 +23,14 @@
 %define targetpkg MozillaFirefox
 %define progdir %{_libdir}/firefox
 %define appname Firefox
-%endif
-
+%else
 %if "%{pkgname}" == "firefox-esr-branding-openSUSE"
 %define targetpkg firefox-esr
 %define progdir %{_libdir}/firefox-esr
 %define appname Firefox ESR
+%else
+ExclusiveArch:  do-not-build
+%endif
 %endif
 
 Name:           %{pkgname}