diff --git a/shell_client.cpp b/shell_client.cpp
--- a/shell_client.cpp
+++ b/shell_client.cpp
@@ -761,6 +761,9 @@
 
 bool ShellClient::isMinimizable() const
 {
+    if (!rules()->checkMinimize(true)) {
+        return false;
+    }
     return (!m_plasmaShellSurface || m_plasmaShellSurface->role() == PlasmaShellSurfaceInterface::Role::Normal);
 }