diff -rupN muse-1.1.old/al/dsp.cpp muse-1.1/al/dsp.cpp
--- muse-1.1.old/al/dsp.cpp	2010-09-21 17:06:55.000000000 -0400
+++ muse-1.1/al/dsp.cpp	2010-09-27 23:52:12.000000000 -0400
@@ -28,7 +28,7 @@ namespace AL {
 
 Dsp* dsp = 0;
 
-#ifdef __i386__
+#if defined(__i386__) || defined(__x86_64__)
 
 //---------------------------------------------------------
 //   DspSSE86
@@ -102,7 +102,7 @@ void initDsp()
 #endif
 #endif
 
-#if defined(__i386__) && defined(USE_SSE)
+#if (defined(__i386__) || defined(__x86_64__)) && defined(USE_SSE)
       unsigned long useSSE = 0;
       if(debugMsg)
         printf("initDsp: __i386__ and USE_SSE defined\n");