diff --git a/imdraw/imdraw.go b/imdraw/imdraw.go
index 3a69537..3f678db 100644
--- a/imdraw/imdraw.go
+++ b/imdraw/imdraw.go
@@ -433,9 +433,13 @@ func (imd *IMDraw) outlineEllipseArc(radius pixel.Vec, low, high, thickness floa
 func (imd *IMDraw) polyline(thickness float64, closed bool) {
 	points := imd.getAndClearPoints()
 
-	if len(points) < 2 {
+	if len(points) == 0 {
 		return
 	}
+	if len(points) == 1 {
+		// one point special case
+		points = append(points, points[0])
+	}
 
 	// first point
 	j, i := 0, 1