Fix define-tests for power pc.
diff --git a/src/utils.h b/src/utils.h
index 2609efa..ce41e62 100644
--- a/src/utils.h
+++ b/src/utils.h
@@ -58,7 +58,7 @@
     defined(__hppa__) || defined(__ia64__) || \
     defined(__mips__) || \
     defined(__powerpc__) || defined(__ppc__) || defined(__ppc64__) || \
-    defined(_POWER) || defined(_ARC_PPC) || \
+    defined(_POWER) || defined(_ARCH_PPC) || defined(_ARCH_PPC64) || \
     defined(__sparc__) || defined(__sparc) || defined(__s390__) || \
     defined(__SH4__) || defined(__alpha__) || \
     defined(_MIPS_ARCH_MIPS32R2) || \