diff --git a/gdb/config/m68k/tm-m68k.h b/gdb/config/m68k/tm-m68k.h
index 164ae959bac..5fef734b2f2 100644
--- a/gdb/config/m68k/tm-m68k.h
+++ b/gdb/config/m68k/tm-m68k.h
@@ -197,6 +197,8 @@ extern CORE_ADDR m68k_saved_pc_after_call PARAMS ((struct frame_info *));
    to be actual register numbers as far as the user is concerned
    but do serve to get the desired values when passed to read_register.  */
 
+#define D0_REGNUM 0
+#define A0_REGNUM 8
 #define A1_REGNUM 9
 #define FP_REGNUM 14		/* Contains address of executing stack frame */
 #define SP_REGNUM 15		/* Contains address of top of stack */