diff --git a/code/compiler/13/main.cpp b/code/compiler/13/main.cpp
index 7ad06c0..1c1fb4a 100644
--- a/code/compiler/13/main.cpp
+++ b/code/compiler/13/main.cpp
@@ -58,11 +58,13 @@ void typecheck_program(
     defs.find_free(free);
     defs.typecheck(mgr, env);
 
+#ifdef DEBUG_OUT
     for(auto& pair : defs.env->names) {
         std::cout << pair.first << ": ";
         pair.second.type->print(mgr, std::cout);
         std::cout << std::endl;
     }
+#endif
 }
 
 global_scope translate_program(definition_group& group) {
@@ -160,7 +162,10 @@ void gen_llvm(global_scope& scope) {
 
     scope.generate_llvm(ctx);
 
+#ifdef DEBUG_OUT
     ctx.module.print(llvm::outs(), nullptr);
+#endif
+
     output_llvm(ctx, "program.o");
 }
 
@@ -177,6 +182,7 @@ int main(int argc, char** argv) {
     type_mgr mgr;
     type_env_ptr env(new type_env);
 
+#ifdef DEBUG_OUT
     for(auto& def_defn : driver.global_defs.defs_defn) {
         std::cout << def_defn.second->name;
         for(auto& param : def_defn.second->params) std::cout << " " << param;
@@ -185,6 +191,8 @@ int main(int argc, char** argv) {
 
         std::cout << std::endl;
     }
+#endif
+
     try {
         typecheck_program(driver.global_defs, mgr, env);
         global_scope scope = translate_program(driver.global_defs);