diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 02662d40277..71332dace78 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2009-04-28  Catherine Moore  <clm@codesourcery.com>
+
+	* debug.h (set_name): Add comment.
+
 2009-04-28  Andrew Pinski  <pinskia@gmail.com>
 
 	PR target/39929
diff --git a/gcc/debug.h b/gcc/debug.h
index 1169c51a66b..6d4911302d0 100644
--- a/gcc/debug.h
+++ b/gcc/debug.h
@@ -126,6 +126,8 @@ struct gcc_debug_hooks
      text sections.  */
   void (* switch_text_section) (void);
 
+  /* Called from grokdeclarator.  Replaces the anonymous name with the
+     type name.  */
   void (* set_name) (tree, tree);
 
   /* This is 1 if the debug writer wants to see start and end commands for the