diff --git a/x11client.cpp b/x11client.cpp
index 55618ff833..85aa3d341f 100644
--- a/x11client.cpp
+++ b/x11client.cpp
@@ -1387,6 +1387,8 @@ bool X11Client::isMinimizable() const
 {
     if (isSpecialWindow() && !isTransient())
         return false;
+    if (hasNETSupport() && !m_motif.minimize())
+        return false;
     if (!rules()->checkMinimize(true))
         return false;
 
@@ -4123,6 +4125,8 @@ bool X11Client::isResizable() const
 bool X11Client::isMaximizable() const
 {
     if (!isResizable() || isToolbar())  // SELI isToolbar() ?
+        return false; 
+    if (hasNETSupport() && !m_motif.maximize())
         return false;
     if (rules()->checkMaximize(MaximizeRestore) == MaximizeRestore && rules()->checkMaximize(MaximizeFull) != MaximizeRestore)
         return true;