1 files changed, 11 insertions, 1 deletions
diff --git a/src/mbgl/style/sources/raster_source.cpp b/src/mbgl/style/sources/raster_source.cpp
index 3c65476df0..94fdbcef12 100644
--- a/src/mbgl/style/sources/raster_source.cpp
+++ b/src/mbgl/style/sources/raster_source.cpp
@@ -5,7 +5,17 @@ namespace mbgl {
 namespace style {
 
 RasterSource::RasterSource(std::string id, variant<std::string, Tileset> urlOrTileset, uint16_t tileSize)
-    : Source(SourceType::Raster, std::make_unique<RasterSource::Impl>(std::move(id), *this, std::move(urlOrTileset), tileSize)) {
+    : Source(SourceType::Raster, std::make_unique<RasterSource::Impl>(std::move(id), *this, std::move(urlOrTileset), tileSize)),
+      impl(static_cast<Impl*>(baseImpl.get())) {
+}
+
+optional<std::string> RasterSource::getURL() const {
+    auto urlOrTileset = impl->getURLOrTileset();
+    if (urlOrTileset.is<std::string>()) {
+        return urlOrTileset.get<std::string>();
+    } else {
+        return {};
+    }
 }
 
 } // namespace style