diff --git a/tools/editor/editor_app.cpp b/tools/editor/editor_app.cpp
index e73c72ef..8181a215 100644
--- a/tools/editor/editor_app.cpp
+++ b/tools/editor/editor_app.cpp
@@ -793,6 +793,7 @@ void EditorApp::exportZone(const std::string& outputDir) {
     WoweeTerrain::exportOpen(terrain_, openBase, loadedTileX_, loadedTileY_);
     WoweeTerrain::exportNormalMap(terrain_, openBase + "_normals.png");
     WoweeTerrain::exportAlphaMaps(terrain_, base + "/alphamaps");
+    WoweeTerrain::exportWaterMask(terrain_, openBase + "_watermask.png");
     WoweeTerrain::exportHeightmapPreview(terrain_, openBase + "_heightmap.png");
     // Also save heightmap as zone thumbnail for content pack browsing
     WoweeTerrain::exportHeightmapPreview(terrain_, base + "/thumbnail.png");