diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index a3762b353f7..b1436a14797 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,8 @@
+2021-03-06  Chernov Sergey  <klen_s@mail.ru>
+
+	PR gdb/27528:
+	* ada-lang.c (ada_fold_name): Use gdb::to_string.
+
 2021-03-06  Tom Tromey  <tom@tromey.com>
 
 	* dwarf2/sect-names.h (dwarf2_elf_names): Declare.
diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c
index bb50222f81c..8f27f3ccdf0 100644
--- a/gdb/ada-lang.c
+++ b/gdb/ada-lang.c
@@ -944,10 +944,10 @@ ada_fold_name (gdb::string_view name)
   static std::string fold_storage;
 
   if (!name.empty () && name[0] == '\'')
-    fold_storage = to_string (name.substr (1, name.size () - 2));
+    fold_storage = gdb::to_string (name.substr (1, name.size () - 2));
   else
     {
-      fold_storage = to_string (name);
+      fold_storage = gdb::to_string (name);
       for (int i = 0; i < name.size (); i += 1)
 	fold_storage[i] = tolower (fold_storage[i]);
     }