diff --git a/src/Makefile b/src/Makefile
index 24a62826..5c8a7a90 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -386,6 +386,13 @@ ifeq ($(avx2),yes)
 	endif
 endif
 
+ifeq ($(sse41),yes)
+	CXXFLAGS += -DUSE_SSE41
+	ifeq ($(comp),$(filter $(comp),gcc clang mingw msys2))
+		CXXFLAGS += -msse4
+	endif
+endif
+
 ### 3.7 pext
 ifeq ($(pext),yes)
 	CXXFLAGS += -DUSE_PEXT