diff --git a/spine-flutter/codegen/src/dart-writer.ts b/spine-flutter/codegen/src/dart-writer.ts
index aeaad450e..33fd4c9e7 100644
--- a/spine-flutter/codegen/src/dart-writer.ts
+++ b/spine-flutter/codegen/src/dart-writer.ts
@@ -1336,8 +1336,10 @@ ${declaration} {`;
 		lines.push(`switch (className) {`);
 
 		for (const subclass of concreteSubclasses) {
+			const cppClass = this.classMap.get(subclass);
+			if (!cppClass) throw Error(`Class ${subclass} not found in class map`);
 			const dartSubclass = this.toDartTypeName(subclass);
-			lines.push(`  case '${subclass}':`);
+			lines.push(`  case '${cppClass.cppType.name}':`);
 			lines.push(`    return ${dartSubclass}.fromPointer(${resultVar}.cast());`);
 		}
 
diff --git a/spine-flutter/test/skeleton_drawable_test.dart b/spine-flutter/test/skeleton_drawable_test.dart
index 3290bef05..929703c38 100644
--- a/spine-flutter/test/skeleton_drawable_test.dart
+++ b/spine-flutter/test/skeleton_drawable_test.dart
@@ -91,6 +91,17 @@ void main() async {
   final boundsInJump = drawable.skeleton.bounds;
   print('  Bounds during jump: $boundsInJump');
 
+  // Test constraint RTTI
+  print('\nTesting constraint RTTI:');
+
+  // IK Constraints
+  print('  Constraints:');
+  for (final constraint in drawable.skeleton.constraints) {
+    final data = constraint?.data;
+    print('  Constraint type: ${constraint?.rtti.className}');
+    print('  Constraint data type: ${constraint?.data?.rtti.className}');
+  }
+
   // Check manager state before cleanup
   print('\nBefore cleanup:');
   AnimationStateEventManager.instance.debugPrint();