diff --git a/icecat.spec b/icecat.spec
index a99ed1a..9e3bff5 100644
--- a/icecat.spec
+++ b/icecat.spec
@@ -381,7 +381,7 @@ mkdir -p %{name}-objdir && pushd %{name}-objdir
  --disable-install-strip \
  --disable-tests \
  --with-branding=browser/branding/official \
-%ifarch %{arm} aarch64
+%ifarch %{arm}
  --disable-optimize
 %else
  --enable-optimize="$MOZ_OPT_FLAGS"
@@ -389,7 +389,7 @@ mkdir -p %{name}-objdir && pushd %{name}-objdir
 
 # On x86 architectures, Mozilla can build up to 4 jobs at once in parallel,
 # however builds tend to fail on other arches when building in parallel.
-%ifarch %{ix86} x86_64 %{power64} aarch64
+%ifarch %{ix86} x86_64 %{power64}
 [ -z "$RPM_BUILD_NCPUS" ] && \
      RPM_BUILD_NCPUS="`%{_bindir}/getconf _NPROCESSORS_ONLN`"
 [ "$RPM_BUILD_NCPUS" -ge 2 ] && MOZ_SMP_FLAGS=-j2