diff --git a/lib/rpmrc.c b/lib/rpmrc.c

index ba156fe..96f05ce 100644

--- a/lib/rpmrc.c

+++ b/lib/rpmrc.c

@@ -1093,8 +1093,11 @@ static void defaultMachine(const char ** arch,

 #	if defined(__linux__) && defined(__powerpc__)

 	{

             int powerlvl;

-            if (sscanf(rpmat.platform, "power%d", &powerlvl) == 1 && powerlvl > 6)

+            if (!rstreq(un.machine, "ppc") &&

+		    sscanf(rpmat.platform, "power%d", &powerlvl) == 1 &&

+		    powerlvl > 6) {

                 strcpy(un.machine, "ppc64p7");

+	    }

         }

 #	endif	/* ppc64*-linux */

diff --git a/macros.in b/macros.in

index 4c77bbb..4a4a1e4 100644

--- a/macros.in

+++ b/macros.in

@@ -998,6 +998,10 @@ done \

 # arch macro for all supported Alpha processors

 %alpha	alpha alphaev56 alphaev6 alphaev67

+#------------------------------------------------------------------------------

+# arch macro for all supported PowerPC 64 processors

+%power64	ppc64 ppc64p7

+

 #------------------------------------------------------------------------

 # Use in %install to generate locale specific file lists. For example,

 #