diff --git a/src/window/vip/framebuffer.rs b/src/window/vip/framebuffer.rs
index ecd8e74..e8eb89c 100644
--- a/src/window/vip/framebuffer.rs
+++ b/src/window/vip/framebuffer.rs
@@ -215,8 +215,8 @@ impl ImageRenderer<1> for FrameBufferRenderer {
     fn render(&mut self, params: &Self::Params, images: &mut [ImageBuffer; 1]) {
         let image = &mut images[0];
 
-        let left_buffer = self.buffers[params.index * 2].borrow();
-        let right_buffer = self.buffers[params.index * 2 + 1].borrow();
+        let left_buffer = self.buffers[params.index].borrow();
+        let right_buffer = self.buffers[2 + params.index].borrow();
 
         let colors = if params.generic_palette {
             [