diff --git a/resources/templates/spark_main/main.gpr b/resources/templates/spark_main/main.gpr
index 739d795..556919a 100644
--- a/resources/templates/spark_main/main.gpr
+++ b/resources/templates/spark_main/main.gpr
@@ -5,7 +5,7 @@ project Main is
    end Compiler;
 
    package Builder is
-      for Switches ("ada") use ("-g", "-O0");
+      for Switches ("ada") use ("-g", "-O0", "-gnata");
 
       for Global_Configuration_Pragmas use "main.adc";
    end Builder;