diff --git a/src/Makefile b/src/Makefile
index fbf75f26c2b1491488da0644a51ee3517c9c13e2..36cd160877dbd05ed1ccc7f4797de0138cc97040 100644
--- a/src/Makefile
+++ b/src/Makefile
@@ -288,7 +288,8 @@ OPTS += -DCOMPVERSION
 
 ifndef NONX86
 ifndef GCC29
-	M5=-march=pentium
+	#M5=-march=pentium
+	M5=-march=nocona -msse -mfpmath=sse
 	M4=-march=i486
 else
 	M5=-mpentium