diff --git a/src/Makevars b/src/Makevars
index abab4e6b..fe240994 100644
--- a/src/Makevars
+++ b/src/Makevars
@@ -1,2 +1,2 @@
 CXX_STD = CXX11
-PKG_CPPFLAGS += -fno-fast-math -mstackrealign
+PKG_CPPFLAGS += -fno-fast-math -msse2  -mstackrealign