diff --git a/gcc/gcc/config/rs6000/macos.h b/gcc/gcc/config/rs6000/macos.h
index c6dd2437f3..1176fe0c6b 100644
--- a/gcc/gcc/config/rs6000/macos.h
+++ b/gcc/gcc/config/rs6000/macos.h
@@ -185,7 +185,7 @@
 // (MASK_POWERPC | MASK_MULTIPLE | MASK_NEW_MNEMONICS)
 
 #undef PROCESSOR_DEFAULT
-#define PROCESSOR_DEFAULT PROCESSOR_PPC603
+#define PROCESSOR_DEFAULT PROCESSOR_PPC601
 
 #undef OS_MISSING_ALTIVEC
 #define OS_MISSING_ALTIVEC 0