diff --git a/cpukit/score/cpu/powerpc/rtems/old-exceptions/cpu.h b/cpukit/score/cpu/powerpc/rtems/old-exceptions/cpu.h
index 854cb9f0d2..7663da5c4a 100644
--- a/cpukit/score/cpu/powerpc/rtems/old-exceptions/cpu.h
+++ b/cpukit/score/cpu/powerpc/rtems/old-exceptions/cpu.h
@@ -1066,15 +1066,6 @@ void _CPU_Fatal_error(
   uint32_t   _error
 );
 
-/*
- *  Routines to access the decrementer register
- */
-
-#define PPC_Set_decrementer( _clicks ) \
-  do { \
-    asm volatile( "mtdec %0" : "=r" ((_clicks)) : "r" ((_clicks)) ); \
-  } while (0)
-
 /*
  *  Routines to access the time base register
  */