diff -r 1f0f9bd93232 -r 8c6fc91495b9 common/autoconf/platform.m4
--- a/common/autoconf/platform.m4	Fri Feb 27 15:41:51 2015 -0800
+++ b/common/autoconf/platform.m4	Tue Mar 03 11:51:15 2015 +0100
@@ -365,7 +365,8 @@
 
   # ZERO_ARCHDEF is used to enable architecture-specific code
   case "${OPENJDK_TARGET_CPU}" in
-    ppc*)    ZERO_ARCHDEF=PPC   ;;
+    ppc)     ZERO_ARCHDEF=PPC32 ;;
+    ppc64)   ZERO_ARCHDEF=PPC64 ;;
     s390*)   ZERO_ARCHDEF=S390  ;;
     sparc*)  ZERO_ARCHDEF=SPARC ;;
     x86_64*) ZERO_ARCHDEF=AMD64 ;;