diff --git a/src/kitemviews/kfileitemmodelrolesupdater.h b/src/kitemviews/kfileitemmodelrolesupdater.h
index e17667a0c6..409f098e8c 100644
--- a/src/kitemviews/kfileitemmodelrolesupdater.h
+++ b/src/kitemviews/kfileitemmodelrolesupdater.h
@@ -54,6 +54,10 @@ class QTimer;
     namespace Nepomuk2
     {
         class Resource;
+        namespace Types
+        {
+            class Property;
+        }
     }
 #endif