diff --git a/README.md b/README.md
index d93ca6e6..bd3c4fc0 100644
--- a/README.md
+++ b/README.md
@@ -174,6 +174,8 @@ information on what to include when reporting a bug.
    scale
  - [Wayland] Bugfix: Window content scale events were not emitted when monitor
    scale changed
+ - [Wayland] Bugfix: `glfwSetWindowAspectRatio` reported an error instead of
+   applying the specified ratio
 
 
 ## Contact
diff --git a/src/wl_window.c b/src/wl_window.c
index 996bac8b..a693bc08 100644
--- a/src/wl_window.c
+++ b/src/wl_window.c
@@ -1988,8 +1988,20 @@ void _glfwPlatformSetWindowSizeLimits(_GLFWwindow* window,
 void _glfwPlatformSetWindowAspectRatio(_GLFWwindow* window,
                                        int numer, int denom)
 {
-    // TODO: find out how to trigger a resize.
-    // The actual limits are checked in the xdg_toplevel::configure handler.
+    if (window->wl.maximized || window->wl.fullscreen)
+        return;
+
+    if (numer != GLFW_DONT_CARE && denom != GLFW_DONT_CARE)
+    {
+        const float aspectRatio = (float) window->wl.width / (float) window->wl.height;
+        const float targetRatio = (float) numer / (float) denom;
+        if (aspectRatio < targetRatio)
+            window->wl.height = window->wl.width / targetRatio;
+        else if (aspectRatio > targetRatio)
+            window->wl.width = window->wl.height * targetRatio;
+
+        resizeWindow(window);
+    }
 }
 
 void _glfwPlatformGetFramebufferSize(_GLFWwindow* window,