diff --git a/src/client/xdgshell.h b/src/client/xdgshell.h
--- a/src/client/xdgshell.h
+++ b/src/client/xdgshell.h
@@ -586,6 +586,16 @@
      */
     void requestGrab(Seat *seat, quint32 serial);
 
+    /**
+     * When a configure event is received, if a client commits the
+     * Surface in response to the configure event, then the client
+     * must make an ackConfigure request sometime before the commit
+     * request, passing along the @p serial of the configure event.
+     * @see configureRequested
+     * @since 5.56
+     **/
+    void ackConfigure(quint32 serial);
+
     operator xdg_surface*();
     operator xdg_surface*() const;
     operator xdg_popup*();
diff --git a/src/client/xdgshell.cpp b/src/client/xdgshell.cpp
--- a/src/client/xdgshell.cpp
+++ b/src/client/xdgshell.cpp
@@ -360,6 +360,11 @@
     d->requestGrab(seat, serial);
 }
 
+void XdgShellPopup::ackConfigure(quint32 serial)
+{
+    d->ackConfigure(serial);
+}
+
 XdgShellPopup::operator xdg_surface*() {
     return *(d.data());
 }
diff --git a/src/client/xdgshell_p.h b/src/client/xdgshell_p.h
--- a/src/client/xdgshell_p.h
+++ b/src/client/xdgshell_p.h
@@ -268,6 +268,10 @@
         Q_UNUSED(seat);
         Q_UNUSED(serial);
     };
+    virtual void ackConfigure(quint32 serial) {
+        Q_UNUSED(serial);
+    }
+
     virtual operator xdg_surface*() {
         return nullptr;
     }
diff --git a/src/client/xdgshell_stable.cpp b/src/client/xdgshell_stable.cpp
--- a/src/client/xdgshell_stable.cpp
+++ b/src/client/xdgshell_stable.cpp
@@ -498,6 +498,7 @@
     void destroy() override;
     bool isValid() const override;
     void requestGrab(Seat *seat, quint32 serial) override;
+    void ackConfigure(quint32 serial) override;
 
     using XdgShellPopup::Private::operator zxdg_popup_v6*;
     using XdgShellPopup::Private::operator zxdg_surface_v6*;
@@ -595,6 +596,10 @@
     xdg_popup_grab(xdgpopup, *seat, serial);
 }
 
+void XdgShellPopupStable::Private::ackConfigure(quint32 serial)
+{
+    xdg_surface_ack_configure(xdgsurface, serial);
+}
 
 XdgShellPopupStable::XdgShellPopupStable(QObject *parent)
     : XdgShellPopup(new Private(this), parent)
diff --git a/src/client/xdgshell_v6.cpp b/src/client/xdgshell_v6.cpp
--- a/src/client/xdgshell_v6.cpp
+++ b/src/client/xdgshell_v6.cpp
@@ -483,6 +483,7 @@
     void destroy() override;
     bool isValid() const override;
     void requestGrab(Seat *seat, quint32 serial) override;
+    void ackConfigure(quint32 serial) override;
 
     using XdgShellPopup::Private::operator xdg_popup*;
     using XdgShellPopup::Private::operator xdg_surface*;
@@ -580,6 +581,10 @@
     zxdg_popup_v6_grab(xdgpopupv6, *seat, serial);
 }
 
+void XdgShellPopupUnstableV6::Private::ackConfigure(quint32 serial)
+{
+    zxdg_surface_v6_ack_configure(xdgsurfacev6, serial);
+}
 
 XdgShellPopupUnstableV6::XdgShellPopupUnstableV6(QObject *parent)
     : XdgShellPopup(new Private(this), parent)