diff --git a/src/blackcore/datacache.h b/src/blackcore/datacache.h
index 3318580ad..ebf43c0c4 100644
--- a/src/blackcore/datacache.h
+++ b/src/blackcore/datacache.h
@@ -27,6 +27,8 @@ namespace BlackCore
      */
     class BLACKCORE_EXPORT CDataCache : public BlackMisc::CValueCache
     {
+        Q_OBJECT
+
     public:
         //! Return the singleton instance.
         static CDataCache *instance();
diff --git a/src/blackcore/settingscache.h b/src/blackcore/settingscache.h
index 49b64e951..165cd078c 100644
--- a/src/blackcore/settingscache.h
+++ b/src/blackcore/settingscache.h
@@ -23,6 +23,8 @@ namespace BlackCore
      */
     class BLACKCORE_EXPORT CSettingsCache : public BlackMisc::CValueCache
     {
+        Q_OBJECT
+
     public:
         //! Return the singleton instance.
         static CSettingsCache *instance();