diff --git a/platform/ios/platform/darwin/src/MLNRasterDEMSource.mm b/platform/ios/platform/darwin/src/MLNRasterDEMSource.mm
index 13ad816027c..88dfebb971f 100644
--- a/platform/ios/platform/darwin/src/MLNRasterDEMSource.mm
+++ b/platform/ios/platform/darwin/src/MLNRasterDEMSource.mm
@@ -7,7 +7,7 @@
 
 @implementation MLNRasterDEMSource
 
-- (std::unique_ptr<mbgl::style::RasterSource>)pendingSourceWithIdentifier:(NSString *)identifier urlOrTileset:(mbgl::variant<std::string, mbgl::Tileset>)urlOrTileset tileSize:(uint16_t)tileSize {
+- (std::unique_ptr<mbgl::style::RasterSource>)pendingSourceWithIdentifier:(NSString *)identifier urlOrTileset:(std::variant<std::string, mbgl::Tileset>)urlOrTileset tileSize:(uint16_t)tileSize {
     auto source = std::make_unique<mbgl::style::RasterDEMSource>(identifier.UTF8String,
                                                                  urlOrTileset,
                                                                  tileSize);