diff -up chrony-1.23/io_linux.h.ppc chrony-1.23/io_linux.h
--- chrony-1.23/io_linux.h.ppc	2007-12-02 15:53:09.000000000 +0100
+++ chrony-1.23/io_linux.h	2008-11-05 19:23:53.000000000 +0100
@@ -16,7 +16,7 @@
 #define CHRONY_IOC_WRITE	1U
 #define CHRONY_IOC_READ	2U
 
-#elif defined(__alpha__) || defined(__sparc__) || defined(__ppc__) || defined(__ppc64__) || defined(__sparc64__)
+#elif defined(__alpha__) || defined(__sparc__) || defined(__ppc__) || defined(__ppc64__) || defined(__sparc64__) || defined(__PPC__)
 #define CHRONY_IOC_NRBITS	8
 #define CHRONY_IOC_TYPEBITS	8
 #define CHRONY_IOC_SIZEBITS	13