diff --git a/src/GUI/AddOnsController.cxx b/src/GUI/AddOnsController.cxx
index 3428dfe4d..39e7e44bd 100644
--- a/src/GUI/AddOnsController.cxx
+++ b/src/GUI/AddOnsController.cxx
@@ -215,7 +215,7 @@ QString AddOnsController::addSceneryPath() const
     SGPath p(path.toStdString());
     bool isValid = false;
 
-    for (const auto& dir: {"Objects", "Terrain", "Buildings", "Roads", "Pylons", "NavData"}) {
+    for (const auto& dir: {"Objects", "Terrain", "Buildings", "Roads", "Pylons", "NavData", "Airports"}) {
         if ((p / dir).exists()) {
             isValid = true;
             break;
@@ -228,7 +228,7 @@ QString AddOnsController::addSceneryPath() const
         mb.setStandardButtons(QMessageBox::Yes | QMessageBox::No);
         mb.setDefaultButton(QMessageBox::No);
         mb.setInformativeText(tr("Added scenery should contain at least one of the following "
-                                 "folders: Objects, Terrain, Buildings, Roads, Pylons, NavData."));
+                                 "folders: Objects, Terrain, Buildings, Roads, Pylons, NavData, Airports."));
         mb.exec();
 
         if (mb.result() == QMessageBox::No) {