diff --git a/Ryujinx.Graphics/Gal/OpenGL/OGLFrameBuffer.cs b/Ryujinx.Graphics/Gal/OpenGL/OGLFrameBuffer.cs
index e0da9179a3..affd479b75 100644
--- a/Ryujinx.Graphics/Gal/OpenGL/OGLFrameBuffer.cs
+++ b/Ryujinx.Graphics/Gal/OpenGL/OGLFrameBuffer.cs
@@ -196,6 +196,19 @@ namespace Ryujinx.Graphics.Gal.OpenGL
             GL.UseProgram(CurrentProgram);
         }
 
+        public void SetWindowSize(int Width, int Height)
+        {
+            int CurrentProgram = GL.GetInteger(GetPName.CurrentProgram);
+
+            GL.UseProgram(Shader.Handle);
+
+            int WindowSizeUniformLocation = GL.GetUniformLocation(Shader.Handle, "window_size");
+
+            GL.Uniform2(WindowSizeUniformLocation, new Vector2(Width, Height));
+
+            GL.UseProgram(CurrentProgram);
+        }
+
         public void SetViewport(int X, int Y, int Width, int Height)
         {
             Viewport = new Rect(X, Y, Width, Height);
diff --git a/Ryujinx.Graphics/Gal/OpenGL/OpenGLRenderer.cs b/Ryujinx.Graphics/Gal/OpenGL/OpenGLRenderer.cs
index 5e066e3f19..cf2da91c55 100644
--- a/Ryujinx.Graphics/Gal/OpenGL/OpenGLRenderer.cs
+++ b/Ryujinx.Graphics/Gal/OpenGL/OpenGLRenderer.cs
@@ -56,7 +56,7 @@ namespace Ryujinx.Graphics.Gal.OpenGL
 
         public void SetWindowSize(int Width, int Height)
         {
-            //TODO
+            FrameBuffer.SetWindowSize(Width, Height);
         }
 
         public void SetBlendEnable(bool Enable)