elsif Contains_Instance_Of (Gen_Unit, Current_Scope, Gen_Id) then
          Error_Msg_Node_2 := Current_Scope;
          Error_Msg_NE
-           ("circular Instantiation: & instantiated in &!", N, Gen_Unit);
+           ("circular instantiation: & instantiated in &!", N, Gen_Unit);
          Circularity_Detected := True;
          Restore_Env;
          goto Leave;
          if Contains_Instance_Of (Gen_Unit, Current_Scope, Gen_Id) then
             Error_Msg_Node_2 := Current_Scope;
             Error_Msg_NE
-              ("circular Instantiation: & instantiated in &!", N, Gen_Unit);
+              ("circular instantiation: & instantiated in &!", N, Gen_Unit);
             Circularity_Detected := True;
             Restore_Hidden_Primitives (Vis_Prims_List);
             goto Leave;
                if Node (Elmt) = Scop then
                   Error_Msg_Node_2 := Inner;
                   Error_Msg_NE
-                    ("circular Instantiation: & instantiated within &!",
+                    ("circular instantiation: & instantiated within &!",
                      N, Scop);
                   return True;
 
                elsif Contains_Instance_Of (Node (Elmt), Scop, N) then
                   Error_Msg_Node_2 := Inner;
                   Error_Msg_NE
-                    ("circular Instantiation: & instantiated within &!",
+                    ("circular instantiation: & instantiated within &!",
                      N, Node (Elmt));
                   return True;
                end if;