diff --git a/src/controls/QskSkinFactory.h b/src/controls/QskSkinFactory.h
index 0f957e89..c5e01c46 100644
--- a/src/controls/QskSkinFactory.h
+++ b/src/controls/QskSkinFactory.h
@@ -10,7 +10,6 @@
 #include <qobject.h>
 
 class QskSkin;
-class QStringList;
 
 class QSK_EXPORT QskSkinFactory : public QObject
 {
diff --git a/src/controls/QskSkinManager.h b/src/controls/QskSkinManager.h
index 0c61b719..67c239f0 100644
--- a/src/controls/QskSkinManager.h
+++ b/src/controls/QskSkinManager.h
@@ -13,7 +13,6 @@
 
 class QskSkin;
 class QskSkinFactory;
-class QStringList;
 
 #if defined( qskSkinManager )
 #undef qskSkinManager
diff --git a/src/dialogs/QskDialog.h b/src/dialogs/QskDialog.h
index ac495321..55f0e080 100644
--- a/src/dialogs/QskDialog.h
+++ b/src/dialogs/QskDialog.h
@@ -12,7 +12,6 @@
 #include <memory>
 
 class QString;
-class QStringList;
 class QWindow;
 
 #if defined( qskDialog )
diff --git a/src/inputpanel/QskInputPanel.h b/src/inputpanel/QskInputPanel.h
index 251bb662..bdd26e92 100644
--- a/src/inputpanel/QskInputPanel.h
+++ b/src/inputpanel/QskInputPanel.h
@@ -11,7 +11,6 @@
 
 class QskTextPredictor;
 class QString;
-class QStringList;
 
 class QSK_EXPORT QskInputPanel : public QskControl
 {
diff --git a/src/inputpanel/QskTextPredictor.h b/src/inputpanel/QskTextPredictor.h
index e3c849ef..edc72c11 100644
--- a/src/inputpanel/QskTextPredictor.h
+++ b/src/inputpanel/QskTextPredictor.h
@@ -9,8 +9,6 @@
 #include <QskGlobal.h>
 #include <qobject.h>
 
-class QStringList;
-
 // abstract base class for input methods for retrieving predictive text
 
 class QSK_EXPORT QskTextPredictor : public QObject