diff --git a/libkeccak.gpr b/libkeccak.gpr
index 2ccca4e..0842ac2 100644
--- a/libkeccak.gpr
+++ b/libkeccak.gpr
@@ -129,6 +129,8 @@ project Libkeccak is
         Style_Checks_Switches &
         Contracts_Switches &
         ("-gnatw.X", -- Disable warnings for No_Exception_Propagation
+         "-fcallgraph-info=su,da", -- Generate data for GNATStack
+         "-fstack-usage",
          "-gnatQ");  -- Don't quit. Generate ALI and tree files even if illegalities
    end Compiler;