diff --git a/cpukit/score/cpu/powerpc/ChangeLog b/cpukit/score/cpu/powerpc/ChangeLog
index 1a2adac236..89a4bfc157 100644
--- a/cpukit/score/cpu/powerpc/ChangeLog
+++ b/cpukit/score/cpu/powerpc/ChangeLog
@@ -1,3 +1,8 @@
+2005-02-18	Ralf Corsepius <ralf.corsepius@rtems.org>
+
+	* rtems/score/cpu.h: Derive CPU_{BIG|LITTLE}_ENDIAN from
+	__BIG_ENDIAN__.
+
 2005-02-18	Ralf Corsepius <ralf.corsepius@rtems.org>
 
 	* rtems/score/cpu.h (CPU_PROVIDES_IDLE_THREAD_BODY,
diff --git a/cpukit/score/cpu/powerpc/rtems/score/cpu.h b/cpukit/score/cpu/powerpc/rtems/score/cpu.h
index b627ff9b40..0a28cb8686 100644
--- a/cpukit/score/cpu/powerpc/rtems/score/cpu.h
+++ b/cpukit/score/cpu/powerpc/rtems/score/cpu.h
@@ -117,9 +117,14 @@
  */
 
 #define CPU_HAS_OWN_HOST_TO_NETWORK_ROUTINES     FALSE
+
+#if defined(__BIG_ENDIAN__) || defined(_BIG_ENDIAN)
 #define CPU_BIG_ENDIAN                           TRUE
 #define CPU_LITTLE_ENDIAN                        FALSE
-
+#else
+#define CPU_BIG_ENDIAN                           FALSE
+#define CPU_LITTLE_ENDIAN                        TRUE
+#endif
 
 /*
  *  Processor defined structures required for cpukit/score.