===================================================================
@@ -161,7 +161,7 @@ private
Stack_Check_Probes : constant Boolean := False;
Stack_Check_Limits : constant Boolean := False;
Support_Aggregates : constant Boolean := True;
- Support_Atomic_Primitives : constant Boolean := True;
+ Support_Atomic_Primitives : constant Boolean := Word_Size = 64;
Support_Composite_Assign : constant Boolean := True;
Support_Composite_Compare : constant Boolean := True;
Support_Long_Shifts : constant Boolean := True;