diff --git a/c/src/lib/libcpu/powerpc/mpc860/include/mpc860.h b/c/src/lib/libcpu/powerpc/mpc860/include/mpc860.h
index 7daee45bf0..4a9c20f049 100644
--- a/c/src/lib/libcpu/powerpc/mpc860/include/mpc860.h
+++ b/c/src/lib/libcpu/powerpc/mpc860/include/mpc860.h
@@ -112,8 +112,8 @@
  * Memory controller registers
  */
 typedef struct m860MEMCRegisters_ {
-  rtems_unsigned32        br;
-  rtems_unsigned32        or;
+  rtems_unsigned32        _br;
+  rtems_unsigned32        _or;
 } m860MEMCRegisters_t;
 
 /*