diff --git a/src/Compositor.cpp b/src/Compositor.cpp
index f670a643..e3392483 100644
--- a/src/Compositor.cpp
+++ b/src/Compositor.cpp
@@ -1616,6 +1616,15 @@ void CCompositor::setWindowFullscreen(CWindow* pWindow, bool on, eFullscreenMode
         return;
     }
 
+    const auto PMONITOR = getMonitorFromID(pWindow->m_iMonitorID);
+
+    const auto PWORKSPACE = getWorkspaceByID(pWindow->m_iWorkspaceID);
+
+    if (PWORKSPACE->m_bHasFullscreenWindow && on) {
+        Debug::log(LOG, "Rejecting fullscreen ON on a fullscreen workspace");
+        return;
+    }
+
     g_pLayoutManager->getCurrentLayout()->fullscreenRequestForWindow(pWindow, mode, on);
 
     g_pXWaylandManager->setWindowFullscreen(pWindow, pWindow->m_bIsFullscreen && mode == FULLSCREEN_FULL);
@@ -1629,8 +1638,6 @@ void CCompositor::setWindowFullscreen(CWindow* pWindow, bool on, eFullscreenMode
         }
     }
 
-    const auto PMONITOR = getMonitorFromID(pWindow->m_iMonitorID);
-
     for (auto& ls : PMONITOR->m_aLayerSurfaceLists[ZWLR_LAYER_SHELL_V1_LAYER_TOP]) {
         if (!ls->fadingOut)
             ls->alpha = pWindow->m_bIsFullscreen && mode == FULLSCREEN_FULL ? 0.f : 255.f;
diff --git a/src/events/Windows.cpp b/src/events/Windows.cpp
index b67a8619..8e6aed25 100644
--- a/src/events/Windows.cpp
+++ b/src/events/Windows.cpp
@@ -705,7 +705,8 @@ void Events::listener_NewXDGDeco(wl_listener* listener, void* data) {
 void Events::listener_requestMaximize(void* owner, void* data) {
     const auto PWINDOW = (CWindow*)owner;
 
-    // ignore
+    g_pCompositor->setWindowFullscreen(PWINDOW, !PWINDOW->m_bIsFullscreen, FULLSCREEN_MAXIMIZED); // this will be rejected if there already is a fullscreen window
+    
     wlr_xdg_surface_schedule_configure(PWINDOW->m_uSurface.xdg);
 }