diff --git a/render_dos.c b/render_dos.c
index c1bc1e9..322f308 100644
--- a/render_dos.c
+++ b/render_dos.c
@@ -638,7 +638,7 @@ int main(int argc, char **argv)
         const float camdis = 7.0f;
 
         ClearDepth(&ctx, 100.0);
-        memset(ctx.colorbuffer, 82, 320*240);
+        memset(ctx.colorbuffer, 82, 320*200);
 
         campos[0] = sin(camangle) * camdis;
         campos[1] = 0.8f * camdis;