diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index d12861fdfc32..cfc062ae8bb4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2003-10-29  John David Anglin  <dave.anglin@nrc-cnrc.gc.ca>
+
+	* pa.h (ASM_COMMENT_START): Define.
+
 2003-10-29  Zack Weinberg  <zack@codesourcery.com>
 
 	* genmodes.c (complete_mode): Record MODE_CC, MODE_INT,
diff --git a/gcc/config/pa/pa.h b/gcc/config/pa/pa.h
index ce69b3bc19bb..800c5df130d9 100644
--- a/gcc/config/pa/pa.h
+++ b/gcc/config/pa/pa.h
@@ -1673,6 +1673,12 @@ do { 									\
 
 /* Control the assembler format that we output.  */
 
+/* A C string constant describing how to begin a comment in the target
+   assembler language.  The compiler assumes that the comment will end at
+   the end of the line.  */
+
+#define ASM_COMMENT_START ";"
+
 /* Output to assembler file text saying following lines
    may contain character constants, extra white space, comments, etc.  */