diff --git a/engine/src/flutter/lib/web_ui/lib/painting.dart b/engine/src/flutter/lib/web_ui/lib/painting.dart
index 75218bab0b1..88ff3ae391e 100644
--- a/engine/src/flutter/lib/web_ui/lib/painting.dart
+++ b/engine/src/flutter/lib/web_ui/lib/painting.dart
@@ -1004,7 +1004,12 @@ class ImageDescriptor {
 
 abstract class FragmentProgram {
   static Future<FragmentProgram> fromAsset(String assetKey) {
-    return engine.renderer.createFragmentProgram(assetKey);
+    // The flutter tool converts all asset keys with spaces into URI
+    // encoded paths (replacing ' ' with '%20', for example). We perform
+    // the same encoding here so that users can load assets with the same
+    // key they have written in the pubspec.
+    final String encodedKey = Uri(path: Uri.encodeFull(assetKey)).path;
+    return engine.renderer.createFragmentProgram(encodedKey);
   }
 
   FragmentShader fragmentShader();
diff --git a/engine/src/flutter/lib/web_ui/test/ui/fragment_shader_test.dart b/engine/src/flutter/lib/web_ui/test/ui/fragment_shader_test.dart
index ea0ee333fef..ce3d1f8e9e7 100644
--- a/engine/src/flutter/lib/web_ui/test/ui/fragment_shader_test.dart
+++ b/engine/src/flutter/lib/web_ui/test/ui/fragment_shader_test.dart
@@ -417,6 +417,12 @@ Future<void> testMain() async {
     }, skip: isWimp); // https://github.com/flutter/flutter/issues/175431
   }
 
+  // Regression test for https://github.com/flutter/flutter/issues/180862.
+  test('fragment shader with space in name loads correctly', () async {
+    assetScope.setAsset('voronoi%20shader', ByteData.sublistView(utf8.encode(kVoronoiShaderSksl)));
+    await expectLater(ui.FragmentProgram.fromAsset('voronoi shader'), completes);
+  }, skip: isWimp); // https://github.com/flutter/flutter/issues/175431
+
   test('getUniformFloat works with correct datatype', () async {
     final ui.FragmentProgram program = await renderer.createFragmentProgram('ink_sparkle');
     final ui.FragmentShader shader = program.fragmentShader();