diff --git a/Makefile b/Makefile
index 713c7e0..6436254 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,7 @@ CFLAGS += -pipe
 CFLAGS += -Wall
 CFLAGS += -O2
 SIMD_CFLAGS += -funroll-loops
+SIMD_CFLAGS += -msse2
 CPPFLAGS += -D_GNU_SOURCE
 CPPFLAGS += -DXKBCOMPOSE=$(shell if test -e /usr/include/xkbcommon/xkbcommon-compose.h ; then echo 1 ; else echo 0 ; fi )
 CFLAGS += $(shell $(PKG_CONFIG) --cflags cairo xcb-dpms xcb-xinerama xcb-atom xcb-image xcb-xkb xkbcommon xkbcommon-x11)