diff --git a/mp3lib/sr1.c b/mp3lib/sr1.c
index 6606ed3429..aadb22c388 100644
--- a/mp3lib/sr1.c
+++ b/mp3lib/sr1.c
@@ -33,10 +33,10 @@
 
 #if ARCH_X86_64
 // 3DNow! and 3DNow!Ext routines don't compile under AMD64
-#undef HAVE_3DNOW
-#undef HAVE_3DNOWEXT
-#define HAVE_3DNOW 0
-#define HAVE_3DNOWEXT 0
+#undef HAVE_AMD3DNOW
+#undef HAVE_AMD3DNOWEXT
+#define HAVE_AMD3DNOW 0
+#define HAVE_AMD3DNOWEXT 0
 #endif
 
 //static FILE* mp3_file=NULL;
@@ -427,7 +427,7 @@ void MP3_Init(void){
     }
 #endif
 
-#if HAVE_3DNOWEXT
+#if HAVE_AMD3DNOWEXT
     if (gCpuCaps.has3DNowExt)
     {
 	dct36_func=dct36_3dnowex;
@@ -436,7 +436,7 @@ void MP3_Init(void){
     }
     else
 #endif
-#if HAVE_3DNOW
+#if HAVE_AMD3DNOW
     if (gCpuCaps.has3DNow)
     {
 	dct36_func = dct36_3dnow;