diff --git a/shell_client.cpp b/shell_client.cpp
index 02504f700c..ee622b0d56 100644
--- a/shell_client.cpp
+++ b/shell_client.cpp
@@ -739,4 +739,14 @@ QPoint ShellClient::transientPlacementHint() const
     return m_shellSurface->transientOffset();
 }
 
+bool ShellClient::isWaitingForMoveResizeSync() const
+{
+    return m_positionAfterResize.isValid();
+}
+
+void ShellClient::doResizeSync()
+{
+    requestGeometry(moveResizeGeometry());
+}
+
 }
diff --git a/shell_client.h b/shell_client.h
index 8d21b17cf9..fee22c459a 100644
--- a/shell_client.h
+++ b/shell_client.h
@@ -122,6 +122,8 @@ protected:
     void setGeometryRestore(const QRect &geo) override {
         m_geomMaximizeRestore = geo;
     }
+    void doResizeSync() override;
+    bool isWaitingForMoveResizeSync() const override;
 
 private Q_SLOTS:
     void clientFullScreenChanged(bool fullScreen);
diff --git a/utils.h b/utils.h
index b1a55cacc0..3ec977bc75 100644
--- a/utils.h
+++ b/utils.h
@@ -206,7 +206,7 @@ static inline int bitCount(uint32_t mask)
 class ClearablePoint
 {
 public:
-    inline bool isValid() {
+    inline bool isValid() const {
         return m_valid;
     }