diff --git a/src/plugins/platforms/xcb/qxcbatom.cpp b/src/plugins/platforms/xcb/qxcbatom.cpp
index fb5c97fe389..6cb6d29de24 100644
--- a/src/plugins/platforms/xcb/qxcbatom.cpp
+++ b/src/plugins/platforms/xcb/qxcbatom.cpp
@@ -54,6 +54,8 @@ static const char *xcb_atomnames = {
 
     "_QT_CLOSE_CONNECTION\0"
 
+    "_QT_GET_TIMESTAMP\0"
+
     "_MOTIF_WM_HINTS\0"
 
     "DTWM_IS_RUNNING\0"
diff --git a/src/plugins/platforms/xcb/qxcbatom.h b/src/plugins/platforms/xcb/qxcbatom.h
index 2171875e001..f94620dc5ef 100644
--- a/src/plugins/platforms/xcb/qxcbatom.h
+++ b/src/plugins/platforms/xcb/qxcbatom.h
@@ -55,6 +55,8 @@ public:
         // Qt/XCB specific
         _QT_CLOSE_CONNECTION,
 
+        _QT_GET_TIMESTAMP,
+
         _MOTIF_WM_HINTS,
 
         DTWM_IS_RUNNING,
diff --git a/src/plugins/platforms/xcb/qxcbconnection.cpp b/src/plugins/platforms/xcb/qxcbconnection.cpp
index 8d811a798bd..f8db7adb77b 100644
--- a/src/plugins/platforms/xcb/qxcbconnection.cpp
+++ b/src/plugins/platforms/xcb/qxcbconnection.cpp
@@ -822,8 +822,8 @@ xcb_timestamp_t QXcbConnection::getTimestamp()
 {
     // send a dummy event to myself to get the timestamp from X server.
     xcb_window_t window = rootWindow();
-    xcb_atom_t dummyAtom = atom(QXcbAtom::CLIP_TEMPORARY);
-    xcb_change_property(xcb_connection(), XCB_PROP_MODE_APPEND, window, dummyAtom,
+    xcb_atom_t dummyAtom = atom(QXcbAtom::_QT_GET_TIMESTAMP);
+    xcb_change_property(xcb_connection(), XCB_PROP_MODE_REPLACE, window, dummyAtom,
                         XCB_ATOM_INTEGER, 32, 0, nullptr);
 
     connection()->flush();
@@ -855,8 +855,6 @@ xcb_timestamp_t QXcbConnection::getTimestamp()
     xcb_timestamp_t timestamp = pn->time;
     free(event);
 
-    xcb_delete_property(xcb_connection(), window, dummyAtom);
-
     return timestamp;
 }