diff --git a/MozillaFirefox.spec b/MozillaFirefox.spec
index e3191c37..15a70e8c 100644
--- a/MozillaFirefox.spec
+++ b/MozillaFirefox.spec
@@ -408,7 +408,7 @@ EOF
 # Done with env-variables.
 source ./.obsenv.sh
 
-%ifarch aarch64 %arm ppc64 ppc64le riscv64 %ix86
+%ifarch aarch64 %arm ppc64 ppc64le riscv64
 %limit_build -m 2500
 %endif
 
@@ -416,7 +416,9 @@ source ./.obsenv.sh
 cat << EOF > $MOZCONFIG
 mk_add_options MOZILLA_OFFICIAL=1
 mk_add_options BUILD_OFFICIAL=1
+%ifnarch %ix86
 mk_add_options MOZ_MAKE_FLAGS=%{?jobs:-j%jobs}
+%endif
 mk_add_options MOZ_OBJDIR=@TOPSRCDIR@/../obj
 . \$topsrcdir/browser/config/mozconfig
 ac_add_options --disable-bootstrap