diff --git a/Makefile.x86_64 b/Makefile.x86_64
index 8a3fc4eae..27eb571ee 100644
--- a/Makefile.x86_64
+++ b/Makefile.x86_64
@@ -16,6 +16,10 @@ ifdef HAVE_SSSE3
 CCOMMON_OPT += -mssse3
 FCOMMON_OPT += -mssse3
 endif
+ifdef HAVE_SSE4_1
+CCOMMON_OPT += -msse4.1
+FCOMMON_OPT += -msse4.1
+endif
 endif
 endif