diff --git a/0-floor/lace_shared/lace_shared.gpr b/0-floor/lace_shared/lace_shared.gpr
index 6f491a9..5a1af93 100644
--- a/0-floor/lace_shared/lace_shared.gpr
+++ b/0-floor/lace_shared/lace_shared.gpr
@@ -147,7 +147,7 @@ is
       is
          when "debug" => for Global_Configuration_Pragmas use "debug.pra";
                          for Default_Switches ("ada") use ("-C", "-j0", "-gnat2022");     -- TODO: Create and use a Builder_Options variable ?
-         when "fast"  => null;
+         when "fast"  => for Default_Switches ("ada") use ("-C", "-j0", "-gnat2022");
          when "small" => null;
       end case;
    end Builder;