diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 07455ab8d2a2..fa6bfeb0a0d6 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2003-05-30  Stan Shebs  <shebs@apple.com>
+
+	* system.h: Poison OBJC_PROLOGUE.
+
 2003-05-30  Roger Sayle  <roger@eyesopen.com>
 
 	* emit-rtl.c (gen_complex_constant_part): New function for getting
diff --git a/gcc/system.h b/gcc/system.h
index f839f6411c6d..222635c8a010 100644
--- a/gcc/system.h
+++ b/gcc/system.h
@@ -640,7 +640,8 @@ typedef char _Bool;
 	BLOCK_PROFILER BLOCK_PROFILER_CODE FUNCTION_BLOCK_PROFILER	   \
 	FUNCTION_BLOCK_PROFILER_EXIT MACHINE_STATE_SAVE			   \
 	MACHINE_STATE_RESTORE SCCS_DIRECTIVE SECTION_ASM_OP		   \
-	ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL ASM_OUTPUT_INTERNAL_LABEL
+	ASM_OUTPUT_DEFINE_LABEL_DIFFERENCE_SYMBOL ASM_OUTPUT_INTERNAL_LABEL \
+	OBJC_PROLOGUE
 
 /* Hooks that are no longer used.  */
  #pragma GCC poison LANG_HOOKS_FUNCTION_MARK LANG_HOOKS_FUNCTION_FREE	\