diff --git a/c/src/ChangeLog b/c/src/ChangeLog
index 026779011e..d1ecb300a8 100644
--- a/c/src/ChangeLog
+++ b/c/src/ChangeLog
@@ -1,3 +1,15 @@
+2004-11-22	Joel Sherrill <joel@OARcorp.com>
+
+	PR 693/misc
+	* libchip/rtc/mc146818a_ioreg.c: Disable unless on a target with
+	in/outport routines.
+
+2004-11-22	Joel Sherrill <joel@OARcorp.com>
+
+	PR 693/misc
+	* libchip/rtc/mc146818a_ioreg.c: Disable unless on a target with
+	in/outport routines.
+
 2004-11-22	Ralf Corsepius <ralf_corsepius@rtems.org>
 
 	* aclocal/enable-itron.m4: Remove (unused).
diff --git a/c/src/libchip/rtc/mc146818a_ioreg.c b/c/src/libchip/rtc/mc146818a_ioreg.c
index b53f577598..4258749d7e 100644
--- a/c/src/libchip/rtc/mc146818a_ioreg.c
+++ b/c/src/libchip/rtc/mc146818a_ioreg.c
@@ -19,6 +19,11 @@
 #include <rtems.h>
 #include <bsp.h>
 
+/*
+ *  At this point, not all CPUs or BSPs have defined in/out port routines.
+ */
+#if defined(__i386__) || defined(__PPC__)
+#if defined(inport_byte)
 uint32_t mc146818a_get_register(
   uint32_t  ulCtrlPort,
   uint8_t   ucRegNum
@@ -43,3 +48,5 @@ void  mc146818a_set_register(
   outport_byte( ulCtrlPort, ucRegNum );
   outport_byte( ulCtrlPort+1, (uint8_t)ucData );
 }
+#endif
+#endif