diff --git a/src/makefile.unix b/src/makefile.unix
index ba9d0ca11d2..4c927972924 100644
--- a/src/makefile.unix
+++ b/src/makefile.unix
@@ -10,7 +10,7 @@ WXLIBS=$(shell wx-config --libs)
 
 USE_UPNP:=0
 
-DEFS=-DNOPCH -DFOURWAYSSE2 -DUSE_SSL
+DEFS=-DNOPCH -DUSE_SSL
 
 # for boost 1.37, add -mt to the boost libraries
 LIBS= \