diff --git a/OpenRA.Game/Graphics/RgbaColorRenderer.cs b/OpenRA.Game/Graphics/RgbaColorRenderer.cs
index 412522d5c52e..c129c6d1eeaa 100644
--- a/OpenRA.Game/Graphics/RgbaColorRenderer.cs
+++ b/OpenRA.Game/Graphics/RgbaColorRenderer.cs
@@ -153,8 +153,8 @@ void DrawConnectedLine(float3[] points, float width, Color color, bool closed)
 				var nextCorner = width / 2 * new float3(-nextDir.Y, nextDir.X, nextDir.Z);
 
 				// Vertices for the corners joining start-end to end-next
-				var cc = closed || i < limit ? IntersectionOf(end + corner, dir, end + nextCorner, nextDir) : end + corner;
-				var cd = closed || i < limit ? IntersectionOf(end - corner, dir, end - nextCorner, nextDir) : end - corner;
+				var cc = closed || i < limit - 1 ? IntersectionOf(end + corner, dir, end + nextCorner, nextDir) : end + corner;
+				var cd = closed || i < limit - 1 ? IntersectionOf(end - corner, dir, end - nextCorner, nextDir) : end - corner;
 
 				// Fill segment
 				vertices[0] = new Vertex(ca + Offset, r, g, b, a, 0, 0);