diff --git a/vlib/gg/draw.c.v b/vlib/gg/draw.c.v
index 31b531c8f7..659f34b7ba 100644
--- a/vlib/gg/draw.c.v
+++ b/vlib/gg/draw.c.v
@@ -658,6 +658,10 @@ pub fn (ctx &Context) draw_arc_empty(x f32, y f32, inner_radius f32, thickness f
 		return
 	}
 
+	if c.a != 255 {
+		sgl.load_pipeline(ctx.timage_pip)
+	}
+
 	mut a1 := start_angle
 	mut a2 := end_angle
 
@@ -721,6 +725,10 @@ pub fn (ctx &Context) draw_arc_filled(x f32, y f32, inner_radius f32, thickness
 		return
 	}
 
+	if c.a != 255 {
+		sgl.load_pipeline(ctx.timage_pip)
+	}
+
 	mut a1 := start_angle
 	mut a2 := end_angle