diff --git a/src/SFML/Window/Unix/WindowImplX11.cpp b/src/SFML/Window/Unix/WindowImplX11.cpp
index 0955d05e1..b5429d2be 100644
--- a/src/SFML/Window/Unix/WindowImplX11.cpp
+++ b/src/SFML/Window/Unix/WindowImplX11.cpp
@@ -94,14 +94,26 @@ constexpr unsigned long eventMask = FocusChangeMask | ButtonPressMask | ButtonRe
 
 constexpr unsigned int maxTrialsCount = 5;
 
-// Filter the events received by windows (only allow those matching a specific window)
+// Filter the events received by windows (only allow those matching a specific window or those needed for the IM to work)
 // NOLINTNEXTLINE(readability-non-const-parameter)
 Bool checkEvent(::Display*, XEvent* event, XPointer userData)
 {
-    // Just check if the event matches the window
-    // The input method sometimes sends ClientMessages with a different window ID,
-    // our event loop has to process them for the IM to work
-    return (event->xany.window == reinterpret_cast<::Window>(userData)) || (event->type == ClientMessage);
+    if (event->xany.window == reinterpret_cast<::Window>(userData))
+    {
+        // The event matches the current window so pick it up
+        return true;
+    }
+    if (event->type == ClientMessage)
+    {
+        // The input method sometimes sends ClientMessage with a different window ID.
+        // Our event loop has to process them for the IM to work.
+        // We assume ClientMessage events not having WM_PROTOCOLS message type are such events.
+        // ClientMessage events having WM_PROTOCOLS message type should be handled by their own window,
+        // so we ignore them here. They will eventually be picked up with the first condition.
+        static const Atom wmProtocols = sf::priv::getAtom("WM_PROTOCOLS");
+        return event->xclient.message_type != wmProtocols;
+    }
+    return false;
 }
 
 // Find the name of the current executable