diff --git a/include/core/events.h b/include/core/events.h
index 322f09e8..17a510b0 100644
--- a/include/core/events.h
+++ b/include/core/events.h
@@ -615,6 +615,10 @@ private:
 };
 
 
+inline uint qHash(const Event::Group &key, uint seed = 0) {
+    return qHash(static_cast<int>(key), seed);
+}
+
 
 ///
 /// Keeps track of scripts
diff --git a/src/ui/mapimageexporter.cpp b/src/ui/mapimageexporter.cpp
index 23b1b8a0..36c1f7ff 100644
--- a/src/ui/mapimageexporter.cpp
+++ b/src/ui/mapimageexporter.cpp
@@ -57,7 +57,7 @@ MapImageExporter::MapImageExporter(QWidget *parent, Project *project, Map *map,
 
     // Update the map selector when the text changes.
     // We don't use QComboBox::currentTextChanged to avoid unnecessary re-rendering.
-    connect(ui->comboBox_MapSelection, &QComboBox::currentIndexChanged, this, &MapImageExporter::updateMapSelection);
+    connect(ui->comboBox_MapSelection, QOverload<int>::of(&QComboBox::currentIndexChanged), this, &MapImageExporter::updateMapSelection);
     connect(ui->comboBox_MapSelection->lineEdit(), &QLineEdit::editingFinished, this, &MapImageExporter::updateMapSelection);
 
     ui->graphicsView_Preview->setFocus();