diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index c72c6934f41..a29b13ae71c 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,9 @@
+2010-12-02  Nathan Froyd  <froydnj@codesourcery.com>
+
+	PR c/45062
+	* c-decl.c (grokparms): Set arg_info->parms to NULL_TREE when
+	!funcdef_flag.
+
 2010-12-02  Sebastian Pop  <sebastian.pop@amd.com>
 
 	PR tree-optimization/45199
diff --git a/gcc/c-decl.c b/gcc/c-decl.c
index b1055b039e9..ac8f020750e 100644
--- a/gcc/c-decl.c
+++ b/gcc/c-decl.c
@@ -6131,9 +6131,13 @@ grokparms (struct c_arg_info *arg_info, bool funcdef_flag)
   else if (arg_types && TREE_CODE (TREE_VALUE (arg_types)) == IDENTIFIER_NODE)
     {
       if (!funcdef_flag)
-	pedwarn (input_location, 0, "parameter names (without types) in function declaration");
+	{
+	  pedwarn (input_location, 0, "parameter names (without types) in function declaration");
+	  arg_info->parms = NULL_TREE;
+	}
+      else
+	arg_info->parms = arg_info->types;
 
-      arg_info->parms = arg_info->types;
       arg_info->types = 0;
       return 0;
     }