diff --git a/erlang27.spec b/erlang27.spec
index 1bebce9..d6c3151 100644
--- a/erlang27.spec
+++ b/erlang27.spec
@@ -312,6 +312,9 @@ sed -i 's|WX_LIBS=`$WX_CONFIG_WITH_ARGS --libs`|WX_LIBS="`$WX_CONFIG_WITH_ARGS -
 %build
 %global _lto_cflags %{_lto_cflags} -ffat-lto-objects
 export CFLAGS="%{optflags} -fno-strict-aliasing"
+%ifarch %x86_64
+export CFLAGS="$CFLAGS -msse2"
+%endif
 export CXXFLAGS=$CFLAGS
 export LANG="en_US.UTF-8"