diff --git a/c/src/lib/libcpu/powerpc/ChangeLog b/c/src/lib/libcpu/powerpc/ChangeLog
index 521b0787e7..0c5d7b338c 100644
--- a/c/src/lib/libcpu/powerpc/ChangeLog
+++ b/c/src/lib/libcpu/powerpc/ChangeLog
@@ -1,3 +1,10 @@
+2007-12-05	Till Straumann <strauman@slac.stanford.edu>
+
+	* rtems/powerpc/powerpc.h: added a #ifdef __ppc_generic
+	branch. The goal is eventually to make this the starting
+	point for cleanup (remove as many branches as possible;
+	replace by run-time tests if necessary).
+
 2007-12-05	Joel Sherrill <joel.sherrill@OARcorp.com>
 
 	* new-exceptions/raw_exception.c: Conditionalize call to
diff --git a/c/src/lib/libcpu/powerpc/rtems/powerpc/powerpc.h b/c/src/lib/libcpu/powerpc/rtems/powerpc/powerpc.h
index fc9a66647c..727e9ad0d4 100644
--- a/c/src/lib/libcpu/powerpc/rtems/powerpc/powerpc.h
+++ b/c/src/lib/libcpu/powerpc/rtems/powerpc/powerpc.h
@@ -272,6 +272,12 @@ extern "C" {
 #define PPC_CACHE_ALIGNMENT	32
 #define PPC_INTERRUPT_MAX       125
 #define PPC_USE_MULTIPLE	1
+
+#elif defined(__ppc_generic)
+/* PPC_INTERRUPT_MAX and PPC_CACHE_ALIGNMENT already defined by score/powerc.h */
+#ifndef PPC_ABI
+#define PPC_ABI PPC_ABI_SVR4
+#endif
 #else
  
 #error "Unsupported CPU Model"