diff --git a/python/gui/auto_generated/qgsdatabaseschemacombobox.sip.in b/python/gui/auto_generated/qgsdatabaseschemacombobox.sip.in
index 27f17268e9b..df658c5a338 100644
--- a/python/gui/auto_generated/qgsdatabaseschemacombobox.sip.in
+++ b/python/gui/auto_generated/qgsdatabaseschemacombobox.sip.in
@@ -80,10 +80,6 @@ Refreshes the list of available schemas.
 Emitted whenever the currently selected schema changes.
 %End
 
-  protected slots:
-    void indexChanged( int i );
-    void rowsChanged();
-
 };
 
 /************************************************************************
diff --git a/python/gui/auto_generated/qgsdatabasetablecombobox.sip.in b/python/gui/auto_generated/qgsdatabasetablecombobox.sip.in
index 660b63da56c..b875b73cdfa 100644
--- a/python/gui/auto_generated/qgsdatabasetablecombobox.sip.in
+++ b/python/gui/auto_generated/qgsdatabasetablecombobox.sip.in
@@ -96,10 +96,6 @@ Refreshes the list of available tables.
 Emitted whenever the currently selected table changes.
 %End
 
-  protected slots:
-    void indexChanged( int i );
-    void rowsChanged();
-
 };
 
 /************************************************************************
diff --git a/python/gui/auto_generated/qgsproviderconnectioncombobox.sip.in b/python/gui/auto_generated/qgsproviderconnectioncombobox.sip.in
index faae5b6593f..13cd6cfe027 100644
--- a/python/gui/auto_generated/qgsproviderconnectioncombobox.sip.in
+++ b/python/gui/auto_generated/qgsproviderconnectioncombobox.sip.in
@@ -61,10 +61,6 @@ Sets the current connection selected in the combo box.
 Emitted whenever the currently selected connection changes.
 %End
 
-  protected slots:
-    void indexChanged( int i );
-    void rowsChanged();
-
 };
 
 /************************************************************************
diff --git a/src/gui/qgsdatabaseschemacombobox.h b/src/gui/qgsdatabaseschemacombobox.h
index 1362939879e..ef20a04aac3 100644
--- a/src/gui/qgsdatabaseschemacombobox.h
+++ b/src/gui/qgsdatabaseschemacombobox.h
@@ -88,7 +88,7 @@ class GUI_EXPORT QgsDatabaseSchemaComboBox : public QWidget
     //! Emitted whenever the currently selected schema changes.
     void schemaChanged( const QString &schema );
 
-  protected slots:
+  private slots:
     void indexChanged( int i );
     void rowsChanged();
 
diff --git a/src/gui/qgsdatabasetablecombobox.h b/src/gui/qgsdatabasetablecombobox.h
index c991233452b..66b360237fc 100644
--- a/src/gui/qgsdatabasetablecombobox.h
+++ b/src/gui/qgsdatabasetablecombobox.h
@@ -104,7 +104,7 @@ class GUI_EXPORT QgsDatabaseTableComboBox : public QWidget
     //! Emitted whenever the currently selected table changes.
     void tableChanged( const QString &table, const QString &schema = QString() );
 
-  protected slots:
+  private slots:
     void indexChanged( int i );
     void rowsChanged();
 
diff --git a/src/gui/qgsproviderconnectioncombobox.h b/src/gui/qgsproviderconnectioncombobox.h
index bd540f1205a..00527f57a07 100644
--- a/src/gui/qgsproviderconnectioncombobox.h
+++ b/src/gui/qgsproviderconnectioncombobox.h
@@ -68,7 +68,7 @@ class GUI_EXPORT QgsProviderConnectionComboBox : public QComboBox
     //! Emitted whenever the currently selected connection changes.
     void connectionChanged( const QString &connection );
 
-  protected slots:
+  private slots:
     void indexChanged( int i );
     void rowsChanged();