diff --git a/lib/ugui.c3l/src/ugui_button.c3 b/lib/ugui.c3l/src/ugui_button.c3
index 5661fbb..93e519f 100644
--- a/lib/ugui.c3l/src/ugui_button.c3
+++ b/lib/ugui.c3l/src/ugui_button.c3
@@ -145,8 +145,6 @@ fn void? Ctx.checkbox_id(&ctx, Id id, String description, Point off, bool* activ
 	// add it to the tree
 	ctx.tree.add(id, ctx.active_div)!;
 
-	// FIXME: for now checkboxes and buttons have no members so the element types
-	//        can be the same
 	if (elem.flags.is_new) {
 		elem.type = ETYPE_BUTTON;
 	} else if (elem.type != ETYPE_BUTTON) {
@@ -163,21 +161,19 @@ fn void? Ctx.checkbox_id(&ctx, Id id, String description, Point off, bool* activ
 	elem.events = ctx.get_elem_events(elem);
 	if (elem.events.mouse_hover && elem.events.mouse_release) *active = !(*active);
 
-	Color col;
+	Color col = ctx.style.bgcolor;
 	if (tick_sprite != {}) {
-		col = ctx.style.bgcolor;
 		ctx.push_rect(elem.bounds, col, parent.div.z_index, do_border: true, do_radius: true)!;
 		if (*active) {
-			ctx.draw_sprite_raw(tick_sprite, elem.bounds)!;
+			ctx.draw_sprite_raw(tick_sprite, elem.bounds, center: true)!;
 		}
 	} else {
-		if (*active) {
-			col = 0xff0000ffu.to_rgba();
-		} else {
-			col = 0xff00ffffu.to_rgba();
-		}
-		// Draw the button
 		ctx.push_rect(elem.bounds, col, parent.div.z_index, do_border: true, do_radius: true)!;
+		if (*active) {
+			ushort x = DEFAULT_CHECKBOX_SIZE / 4;
+			Rect check = elem.bounds.add({x, x, -x*2, -x*2});
+			ctx.push_rect(check, 0xff0000ffu.to_rgba(), parent.div.z_index, do_radius: true)!;
+		}
 	}
 }
 
diff --git a/lib/ugui.c3l/src/ugui_cmd.c3 b/lib/ugui.c3l/src/ugui_cmd.c3
index 5b2ac83..5c76aeb 100644
--- a/lib/ugui.c3l/src/ugui_cmd.c3
+++ b/lib/ugui.c3l/src/ugui_cmd.c3
@@ -124,7 +124,6 @@ fn void? Ctx.push_rect(&ctx, Rect rect, Color color, int z_index, bool do_border
 	ctx.push_cmd(&cmd, z_index)!;
 }
 
-// TODO: add texture id
 fn void? Ctx.push_sprite(&ctx, Rect bounds, Rect texture, Id texture_id, int z_index, Color hue = 0xffffffffu.to_rgba(), SpriteType type = SPRITE_NORMAL)
 {
 	Cmd cmd = {
diff --git a/lib/ugui.c3l/src/ugui_sprite.c3 b/lib/ugui.c3l/src/ugui_sprite.c3
index 888a1b4..216b1e2 100644
--- a/lib/ugui.c3l/src/ugui_sprite.c3
+++ b/lib/ugui.c3l/src/ugui_sprite.c3
@@ -145,10 +145,16 @@ fn void? Ctx.draw_sprite_id(&ctx, Id id, String name, Point off)
 	return ctx.push_sprite(elem.bounds, uv, tex_id, parent.div.z_index)!;
 }
 
-fn void? Ctx.draw_sprite_raw(&ctx, String name, Rect bounds)
+fn void? Ctx.draw_sprite_raw(&ctx, String name, Rect bounds, bool center = false)
 {
 	Elem *parent = ctx.get_parent()!;
 	Sprite* sprite = ctx.sprite_atlas.get(name)!;
 	Id tex_id = ctx.sprite_atlas.id;
+	
+	if (center) {
+		Point off = {.x = (bounds.w - sprite.w) / 2, .y = (bounds.h - sprite.h) / 2};
+		bounds = bounds.off(off);
+	}
+	
 	return ctx.push_sprite(bounds, sprite.uv(), tex_id, parent.div.z_index, type: sprite.type)!;
 }
diff --git a/src/main.c3 b/src/main.c3
index af2b584..337cf81 100644
--- a/src/main.c3
+++ b/src/main.c3
@@ -228,6 +228,7 @@ fn int main(String[] args)
 			ui.layout_next_row()!!;
 			static bool check;
 			ui.checkbox("", {}, &check, "tick")!!;
+			ui.checkbox("", {}, &check)!!;
 			ui.toggle("", {}, &toggle)!!;
 		};
 		ui.draw_sprite("tux")!!;