diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,6 +38,7 @@
 endif()
 
 set(KDECORATION2_INCLUDEDIR "${CMAKE_INSTALL_INCLUDEDIR}/KDecoration2")
+find_package(KF5I18n CONFIG REQUIRED)
 
 # Subdirectories
 add_subdirectory(src)
diff --git a/autotests/mockclient.h b/autotests/mockclient.h
--- a/autotests/mockclient.h
+++ b/autotests/mockclient.h
@@ -65,6 +65,8 @@
     void requestToggleKeepBelow() override;
     void requestToggleOnAllDesktops() override;
     void requestToggleShade() override;
+    void requestShowToolTip(const QString &text) override;
+    void requestHideToolTip() override;
     int width() const override;
     WId windowId() const override;
 
diff --git a/autotests/mockclient.cpp b/autotests/mockclient.cpp
--- a/autotests/mockclient.cpp
+++ b/autotests/mockclient.cpp
@@ -232,6 +232,16 @@
     emit client()->shadedChanged(m_shaded);
 }
 
+void MockClient::requestShowToolTip(const QString &text)
+{
+    Q_UNUSED(text);
+}
+
+void MockClient::requestHideToolTip()
+{
+
+}
+
 int MockClient::width() const
 {
     return m_width;
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -19,6 +19,7 @@
         Qt5::Gui
     PRIVATE
         kdecorations2private
+        KF5::I18n
 )
 
 target_include_directories(kdecorations2 INTERFACE "$<INSTALL_INTERFACE:${KDECORATION2_INCLUDEDIR}>" )
diff --git a/src/decoration.h b/src/decoration.h
--- a/src/decoration.h
+++ b/src/decoration.h
@@ -176,6 +176,8 @@
     void requestToggleKeepAbove();
     void requestToggleKeepBelow();
     void requestShowWindowMenu();
+    void requestShowToolTip(const QString &text);
+    void requestHideToolTip();
 
     void showApplicationMenu(int actionId);
     void requestShowApplicationMenu(const QRect &rect, int actionId);
diff --git a/src/decoration.cpp b/src/decoration.cpp
--- a/src/decoration.cpp
+++ b/src/decoration.cpp
@@ -180,6 +180,16 @@
 
 #undef DELEGATE
 
+void Decoration::requestShowToolTip(const QString &text)
+{
+    d->client->d->requestShowToolTip(text);
+}
+
+void Decoration::requestHideToolTip()
+{
+    d->client->d->requestHideToolTip();
+}
+
 void Decoration::requestToggleMaximization(Qt::MouseButtons buttons)
 {
     d->client->d->requestToggleMaximization(buttons);
diff --git a/src/decorationbutton.cpp b/src/decorationbutton.cpp
--- a/src/decorationbutton.cpp
+++ b/src/decorationbutton.cpp
@@ -24,6 +24,9 @@
 #include "decoratedclient.h"
 #include "decorationsettings.h"
 
+#include <KLocalizedString>
+
+#include <QDebug>
 #include <QElapsedTimer>
 #include <QHoverEvent>
 #include <QGuiApplication>
@@ -284,6 +287,49 @@
     }
 }
 
+QString DecorationButton::Private::typeToString(DecorationButtonType type)
+{
+    switch (type) {
+    case DecorationButtonType::Menu:
+        return i18n("Menu");
+    case DecorationButtonType::ApplicationMenu:
+        return i18n("Application menu");
+    case DecorationButtonType::OnAllDesktops:
+        if ( this->q->isChecked() )
+            return i18n("On one desktop");
+        else
+            return i18n("On all desktops");
+    case DecorationButtonType::Minimize:
+        return i18n("Minimize");
+    case DecorationButtonType::Maximize:
+        if ( this->q->isChecked() )
+            return i18n("Restore");
+        else
+            return i18n("Maximize");
+    case DecorationButtonType::Close:
+        return i18n("Close");
+    case DecorationButtonType::ContextHelp:
+        return i18n("Context help");
+    case DecorationButtonType::Shade:
+        if ( this->q->isChecked() )
+            return i18n("Unshade");
+        else
+            return i18n("Shade");
+    case DecorationButtonType::KeepBelow:
+        if ( this->q->isChecked() )
+            return i18n("Don't keep below");
+        else
+            return i18n("Keep below");
+    case DecorationButtonType::KeepAbove:
+        if ( this->q->isChecked() )
+            return i18n("Don't keep above");
+        else
+            return i18n("Keep above");
+    default:
+        return QString();
+    }
+}
+
 DecorationButton::DecorationButton(DecorationButtonType type, const QPointer<Decoration> &decoration, QObject *parent)
     : QObject(parent)
     , d(new Private(type, decoration, this))
@@ -293,6 +339,17 @@
             this, static_cast<void (DecorationButton::*)(const QRectF&)>(&DecorationButton::update));
     auto updateSlot = static_cast<void (DecorationButton::*)()>(&DecorationButton::update);
     connect(this, &DecorationButton::hoveredChanged, this, updateSlot);
+    connect(this, &DecorationButton::hoveredChanged, this,
+        [this](bool hovered) {
+            if (hovered) {
+                //TODO: show tooltip if hovered and hide if not
+                const QString type = this->d->typeToString(this->type());
+                this->decoration()->requestShowToolTip(type);
+            } else {
+                this->decoration()->requestHideToolTip();
+            }
+        }
+    );
     connect(this, &DecorationButton::pressedChanged, this, updateSlot);
     connect(this, &DecorationButton::checkedChanged, this, updateSlot);
     connect(this, &DecorationButton::enabledChanged, this, updateSlot);
diff --git a/src/decorationbutton_p.h b/src/decorationbutton_p.h
--- a/src/decorationbutton_p.h
+++ b/src/decorationbutton_p.h
@@ -66,6 +66,8 @@
     void startPressAndHold();
     void stopPressAndHold();
 
+    QString typeToString(DecorationButtonType type);
+
     QPointer<Decoration> decoration;
     DecorationButtonType type;
     QRectF geometry;
diff --git a/src/private/CMakeLists.txt b/src/private/CMakeLists.txt
--- a/src/private/CMakeLists.txt
+++ b/src/private/CMakeLists.txt
@@ -25,7 +25,7 @@
 target_include_directories(kdecorations2private INTERFACE "$<INSTALL_INTERFACE:${KDECORATION2_INCLUDEDIR}>" )
 
 set_target_properties(kdecorations2private PROPERTIES VERSION   ${KDECORATION2_VERSION_STRING}
-                                                      SOVERSION ${KDECORATION2_SOVERSION}
+                                                      SOVERSION 6
                                                       EXPORT_NAME KDecoration2Private
 )
 
diff --git a/src/private/decoratedclientprivate.h b/src/private/decoratedclientprivate.h
--- a/src/private/decoratedclientprivate.h
+++ b/src/private/decoratedclientprivate.h
@@ -76,6 +76,8 @@
     virtual QPalette palette() const = 0;
     virtual Qt::Edges adjacentScreenEdges() const = 0;
 
+    virtual void requestShowToolTip(const QString &text) = 0;
+    virtual void requestHideToolTip() = 0;
     virtual void requestClose() = 0;
     virtual void requestToggleMaximization(Qt::MouseButtons buttons) = 0;
     virtual void requestMinimize() = 0;