diff --git a/src/source/raster_tile_source.js b/src/source/raster_tile_source.js
index 870f62709d4..15e91fde043 100644
--- a/src/source/raster_tile_source.js
+++ b/src/source/raster_tile_source.js
@@ -22,13 +22,13 @@ class RasterTileSource extends Evented {
         this.scheme = 'xyz';
         this.tileSize = 512;
         this._loaded = false;
-        this.options = options;
+        this._options = util.extend({}, options);
         util.extend(this, util.pick(options, ['url', 'scheme', 'tileSize']));
     }
 
     load() {
         this.fire('dataloading', {dataType: 'source'});
-        loadTileJSON(this.options, (err, tileJSON) => {
+        loadTileJSON(this._options, (err, tileJSON) => {
             if (err) {
                 return this.fire('error', err);
             }
@@ -58,13 +58,7 @@ class RasterTileSource extends Evented {
     }
 
     serialize() {
-        return {
-            type: 'raster',
-            url: this.url,
-            tileSize: this.tileSize,
-            tiles: this.tiles,
-            bounds: this.bounds,
-        };
+        return util.extend({}, this._options);
     }
 
     hasTile(coord) {
diff --git a/test/unit/style/style.test.js b/test/unit/style/style.test.js
index ed2efdd84ab..bcaf4249665 100644
--- a/test/unit/style/style.test.js
+++ b/test/unit/style/style.test.js
@@ -347,6 +347,27 @@ test('Style#setState', (t) => {
         });
     });
 
+    t.test('Issue #3893: compare new source options against originally provided options rather than normalized properties', (t) => {
+        window.useFakeXMLHttpRequest();
+        window.server.respondWith('/tilejson.json', JSON.stringify({
+            tiles: ['http://tiles.server']
+        }));
+        const initial = createStyleJSON();
+        initial.sources.mySource = {
+            type: 'raster',
+            url: '/tilejson.json'
+        };
+        const style = new Style(initial);
+        style.on('style.load', () => {
+            t.stub(style, 'removeSource').callsFake(() => t.fail('removeSource called'));
+            t.stub(style, 'addSource').callsFake(() => t.fail('addSource called'));
+            style.setState(initial);
+            window.restore();
+            t.end();
+        });
+        window.server.respond();
+    });
+
     t.test('return true if there is a change', (t) => {
         const initialState = createStyleJSON();
         const nextState = createStyleJSON({