diff --git a/src/components/main/compositing/run.rs b/src/components/main/compositing/run.rs
index cd9b44d74bb..4e841239f19 100644
--- a/src/components/main/compositing/run.rs
+++ b/src/components/main/compositing/run.rs
@@ -378,7 +378,7 @@ pub fn run_compositor(compositor: &CompositorTask) {
             let img = png::Image {
                 width: width as u32,
                 height: height as u32,
-                color_type: png::RGBA8,
+                color_type: png::RGB8,
                 pixels: pixels,
             };
             let res = png::store_png(&img, &path);