1 files changed, 4 insertions, 4 deletions
diff --git a/gcc/ada/a-cohase.ads b/gcc/ada/a-cohase.ads
index b0eb14cc290..5c32f51b53e 100644
--- a/gcc/ada/a-cohase.ads
+++ b/gcc/ada/a-cohase.ads
@@ -238,13 +238,13 @@ private
       end record;
 
    procedure Write
-     (Stream : access Root_Stream_Type'Class;
+     (Stream : not null access Root_Stream_Type'Class;
       Item   : Cursor);
 
    for Cursor'Write use Write;
 
    procedure Read
-     (Stream : access Root_Stream_Type'Class;
+     (Stream : not null access Root_Stream_Type'Class;
       Item   : out Cursor);
 
    for Cursor'Read use Read;
@@ -252,13 +252,13 @@ private
    No_Element : constant Cursor := (Container => null, Node => null);
 
    procedure Write
-     (Stream    : access Root_Stream_Type'Class;
+     (Stream    : not null access Root_Stream_Type'Class;
       Container : Set);
 
    for Set'Write use Write;
 
    procedure Read
-     (Stream    : access Root_Stream_Type'Class;
+     (Stream    : not null access Root_Stream_Type'Class;
       Container : out Set);
 
    for Set'Read use Read;