diff --git a/src/applib/app_builder_widget.h b/src/applib/app_builder_widget.h
index 4c121d8..2534566 100644
--- a/src/applib/app_builder_widget.h
+++ b/src/applib/app_builder_widget.h
@@ -16,6 +16,7 @@ Copyright:
 #include <string>
 #include <gtkmm.h>
 #include <memory>
+#include <utility>
 
 #include "hz/debug.h"
 #include "hz/data_file.h"
@@ -179,7 +180,7 @@ template<typename WidgetPtr>
 WidgetPtr AppBuilderWidget<Child, MultiInstance, WidgetType>::lookup_widget(const Glib::ustring& name)
 {
 	WidgetPtr w = nullptr;
-	lookup_widget(name, w);
+	[[maybe_unused]] bool success = lookup_widget(name, w);
 	return w;
 }
 
diff --git a/src/applib/smartctl_executor.h b/src/applib/smartctl_executor.h
index e2efd1e..350a81a 100644
--- a/src/applib/smartctl_executor.h
+++ b/src/applib/smartctl_executor.h
@@ -137,7 +137,7 @@ class SmartctlExecutorGeneric : public ExecutorSync {
 			// Treat most exit codes as non-errors.
 			if (error_type == "exit") {
 				int exit_code = 0;
-				e->get_code(exit_code);
+				[[maybe_unused]] const bool status = e->get_code(exit_code);
 				// Ignore everyone except this.
 				// Note that we don't treat exit_open_failed as failure because:
 				// * It may be returned from a DVD that returns product info but has no disk inside;