diff --git a/utils/rbutilqt/base/playerbuildinfo.h b/utils/rbutilqt/base/playerbuildinfo.h
index 8b7e5934d1..7997efcd5a 100644
--- a/utils/rbutilqt/base/playerbuildinfo.h
+++ b/utils/rbutilqt/base/playerbuildinfo.h
@@ -30,6 +30,7 @@
 // For build info data retrieved from the build server has to be passed.
 class PlayerBuildInfo : public QObject
 {
+    Q_OBJECT
 public:
 
     enum BuildType {
diff --git a/utils/rbutilqt/base/system.h b/utils/rbutilqt/base/system.h
index 61f0a6f1a9..dba890f0c1 100644
--- a/utils/rbutilqt/base/system.h
+++ b/utils/rbutilqt/base/system.h
@@ -32,6 +32,7 @@
 
 class System : public QObject
 {
+    Q_OBJECT
 public:
     System() {}
 
@@ -50,4 +51,3 @@ public:
 
 };
 #endif
-
diff --git a/utils/rbutilqt/base/utils.h b/utils/rbutilqt/base/utils.h
index 7f27c7d321..c3c7cb949c 100644
--- a/utils/rbutilqt/base/utils.h
+++ b/utils/rbutilqt/base/utils.h
@@ -29,6 +29,7 @@
 
 class Utils : public QObject
 {
+    Q_OBJECT
 public:
     enum Size {
         FilesystemTotal,
@@ -61,4 +62,3 @@ public:
 };
 
 #endif
-