diff --git a/OpenRA.Mods.RA/Minelayer.cs b/OpenRA.Mods.RA/Minelayer.cs
index 7b76ec7f44..8890d335c4 100644
--- a/OpenRA.Mods.RA/Minelayer.cs
+++ b/OpenRA.Mods.RA/Minelayer.cs
@@ -81,7 +81,7 @@ namespace OpenRA.Mods.RA
 			var p = end - start;
 			var q = new float2(p.Y, -p.X);
 			q = (start != end) ? (1 / q.Length) * q : new float2(1, 0);
-			var c = -float2.Dot(q, start.ToFloat2());
+			var c = -float2.Dot(q, start.ToInt2());
 
 			/* return all points such that |ax + by + c| < depth */