diff --git a/gcc/cp/ChangeLog b/gcc/cp/ChangeLog
index c77d86facec0..5ec2e4bdeac2 100644
--- a/gcc/cp/ChangeLog
+++ b/gcc/cp/ChangeLog
@@ -1,3 +1,9 @@
+2014-01-02  Marc Glisse  <marc.glisse@inria.fr>
+
+	PR c++/59087
+	* parser.c (cp_parser_userdef_numeric_literal): Mention
+	-fext-numeric-literals in the message.
+
 2014-01-02  Marc Glisse  <marc.glisse@inria.fr>
 
 	PR c++/59641
diff --git a/gcc/cp/parser.c b/gcc/cp/parser.c
index 08ae4512fb18..35dcefd26564 100644
--- a/gcc/cp/parser.c
+++ b/gcc/cp/parser.c
@@ -3925,6 +3925,9 @@ cp_parser_userdef_numeric_literal (cp_parser *parser)
   release_tree_vector (args);
 
   error ("unable to find numeric literal operator %qD", name);
+  if (!cpp_get_options (parse_in)->ext_numeric_literals)
+    inform (token->location, "use -std=gnu++11 or -fext-numeric-literals "
+	    "to enable more built-in suffixes");
   return error_mark_node;
 }