diff --git a/src/gallium/state_trackers/xorg/xorg_composite.c b/src/gallium/state_trackers/xorg/xorg_composite.c
index b07192175e2..d6483fb72c4 100644
--- a/src/gallium/state_trackers/xorg/xorg_composite.c
+++ b/src/gallium/state_trackers/xorg/xorg_composite.c
@@ -34,7 +34,7 @@ static const struct xorg_composite_blend xorg_blends[] = {
      PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ONE },
 
    { PictOpOver,
-     PIPE_BLENDFACTOR_ONE, PIPE_BLENDFACTOR_ONE,
+     PIPE_BLENDFACTOR_SRC_ALPHA, PIPE_BLENDFACTOR_ONE,
      PIPE_BLENDFACTOR_INV_SRC_ALPHA, PIPE_BLENDFACTOR_INV_SRC_ALPHA },
 
    { PictOpOverReverse,