diff --git a/src/platforms/rcore_desktop_rgfw.c b/src/platforms/rcore_desktop_rgfw.c
index 51a73e1ad..11f268d9f 100755
--- a/src/platforms/rcore_desktop_rgfw.c
+++ b/src/platforms/rcore_desktop_rgfw.c
@@ -821,6 +821,11 @@ void SetWindowSize(int width, int height)
         CORE.Window.screen.height = height;
     }
 
+    if (!CORE.Window.usingFbo)
+    {
+        SetupViewport(CORE.Window.screen.width, CORE.Window.screen.height);
+    }
+
     RGFW_window_resize(platform.window, CORE.Window.screen.width, CORE.Window.screen.height);
 }