1 files changed, 7 insertions, 1 deletions
diff --git a/platform/darwin/src/MGLRasterSource.mm b/platform/darwin/src/MGLRasterSource.mm
index edca8bced1..fd36413fe0 100644
--- a/platform/darwin/src/MGLRasterSource.mm
+++ b/platform/darwin/src/MGLRasterSource.mm
@@ -5,6 +5,7 @@
 #import "MGLTileSource_Private.h"
 #import "NSURL+MGLAdditions.h"
 
+#include <mbgl/map/map.hpp>
 #include <mbgl/style/sources/raster_source.hpp>
 
 const MGLTileSourceOption MGLTileSourceOptionTileSize = @"MGLTileSourceOptionTileSize";
@@ -50,7 +51,7 @@ static const CGFloat MGLRasterSourceRetinaTileSize = 512;
     if (self = [super initWithIdentifier:identifier tileURLTemplates:tileURLTemplates options:options]) {
         mbgl::Tileset tileSet = MGLTileSetFromTileURLTemplates(tileURLTemplates, options);
         
-        uint16_t tileSize;
+        uint16_t tileSize = MGLRasterSourceRetinaTileSize;
         if (NSNumber *tileSizeNumber = options[MGLTileSourceOptionTileSize]) {
             if (![tileSizeNumber isKindOfClass:[NSNumber class]]) {
                 [NSException raise:NSInvalidArgumentException
@@ -95,6 +96,11 @@ static const CGFloat MGLRasterSourceRetinaTileSize = 512;
     super.rawSource = rawSource;
 }
 
+- (NSURL *)configurationURL {
+    auto url = self.rawSource->getURL();
+    return url ? [NSURL URLWithString:@(url->c_str())] : nil;
+}
+
 - (NSString *)attributionHTMLString {
     auto attribution = self.rawSource->getAttribution();
     return attribution ? @(attribution->c_str()) : nil;