@@ -811,11 +811,12 @@
 
 	AC_MSG_CHECKING(whether we have an atomic ops assembly implementation)
 	AC_EGREP_CPP(yes, [
 		#if defined(__GNUC__) && (defined(__i386__) || \
 			defined(__x86_64__) || defined(__amd64__)) || \
-			(defined(__ppc__) && !defined(__APPLE_CC__))
+			((defined(__ppc__) || defined(__PPC__) || \
+			defined(__powerpc__)) && !defined(__APPLE_CC__))
 		yes
 		#endif
 	], [
 		AC_MSG_RESULT(yes)
 		atomic_ops="assembly implementation"