diff --git a/src/SFML/Window/Unix/WindowImplX11.cpp b/src/SFML/Window/Unix/WindowImplX11.cpp
index 5fe6eb16..9e7fca76 100644
--- a/src/SFML/Window/Unix/WindowImplX11.cpp
+++ b/src/SFML/Window/Unix/WindowImplX11.cpp
@@ -1003,7 +1003,7 @@ void WindowImplX11::setVisible(bool visible)
 
         // Before continuing, make sure the WM has
         // internally marked the window as viewable
-        while (!m_windowMapped)
+        while (!m_windowMapped && !m_isExternal)
             processEvents();
     }
     else
@@ -1023,7 +1023,7 @@ void WindowImplX11::setVisible(bool visible)
 
         // Before continuing, make sure the WM has
         // internally marked the window as unviewable
-        while (m_windowMapped)
+        while (m_windowMapped && !m_isExternal)
             processEvents();
     }
 }