diff --git a/src/object_schema.hpp b/src/object_schema.hpp
index 4ab2abf1..10a2e555 100644
--- a/src/object_schema.hpp
+++ b/src/object_schema.hpp
@@ -26,7 +26,7 @@
 
 namespace realm {
     class Group;
-    class Property;
+    struct Property;
 
     class ObjectSchema {
     public: