diff --git a/sdlui/renderer.go b/sdlui/renderer.go
index 2bd19b2..1558eb2 100644
--- a/sdlui/renderer.go
+++ b/sdlui/renderer.go
@@ -367,7 +367,7 @@ func (r *Renderer) FillRectangle(rect geom.RectangleF32, c color.Color) {
 
 func (r *Renderer) Line(p, q geom.PointF32, color color.Color, thickness float32) {
 	r.SetDrawColorGo(color)
-	r.renderer.DrawLineF(p.X, p.Y, p.X, p.Y)
+	r.renderer.DrawLineF(p.X, p.Y, q.X, q.Y)
 }
 
 func (r *Renderer) Rectangle(rect geom.RectangleF32, c color.Color, thickness float32) {