diff --git a/gcc/ada/libgnat/s-atacco.ads b/gcc/ada/libgnat/s-atacco.ads
--- a/gcc/ada/libgnat/s-atacco.ads
+++ b/gcc/ada/libgnat/s-atacco.ads
@@ -54,8 +54,10 @@ package System.Address_To_Access_Conversions is
    --  optimizations that may cause unexpected results based on the assumption
    --  of no strict aliasing.
 
-   function To_Pointer (Value : Address)        return Object_Pointer;
-   function To_Address (Value : Object_Pointer) return Address;
+   function To_Pointer (Value : Address)        return Object_Pointer with
+     Global => null;
+   function To_Address (Value : Object_Pointer) return Address with
+     SPARK_Mode => Off;
 
    pragma Import (Intrinsic, To_Pointer);
    pragma Import (Intrinsic, To_Address);