diff --git a/c/src/exec/score/src/mpci.c b/c/src/exec/score/src/mpci.c
index bc3381c925..ba6625a6a8 100644
--- a/c/src/exec/score/src/mpci.c
+++ b/c/src/exec/score/src/mpci.c
@@ -152,7 +152,7 @@ void _MPCI_Initialization ( void )
  */
  
 void _MPCI_Register_packet_processor(
-  Objects_Classes        the_class,
+  MP_packet_Classes      the_class,
   MPCI_Packet_processor  the_packet_processor
  
 )
diff --git a/cpukit/score/src/mpci.c b/cpukit/score/src/mpci.c
index bc3381c925..ba6625a6a8 100644
--- a/cpukit/score/src/mpci.c
+++ b/cpukit/score/src/mpci.c
@@ -152,7 +152,7 @@ void _MPCI_Initialization ( void )
  */
  
 void _MPCI_Register_packet_processor(
-  Objects_Classes        the_class,
+  MP_packet_Classes      the_class,
   MPCI_Packet_processor  the_packet_processor
  
 )