diff --git a/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs b/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
index 76dd0657a7..2345b1f2e2 100644
--- a/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
+++ b/OpenRA.Mods.Common/UtilityCommands/UpgradeRules.cs
@@ -676,6 +676,22 @@ namespace OpenRA.Mods.Common.UtilityCommands
 					}
 				}
 
+				// Migrated Minelayer.MinefieldDepth to use WDist instead of float
+				if (engineVersion < 20160325)
+				{
+					if (node.Key.StartsWith("Minelayer"))
+					{
+						var depthNode = node.Value.Nodes.FirstOrDefault(x => x.Key == "MinefieldDepth");
+						if (depthNode != null)
+						{
+							// The MinefieldDepth value is now a WDist, so multiply the float value with 1024.
+							var oldValue = FieldLoader.GetValue<float>("MinefieldDepth", depthNode.Value.Value);
+							var newValue = (int)(oldValue * 1024);
+							depthNode.Value.Value = newValue.ToString();
+						}
+					}
+				}
+
 				UpgradeActorRules(engineVersion, ref node.Value.Nodes, node, depth + 1);
 			}
 		}
diff --git a/OpenRA.Mods.RA/Traits/Minelayer.cs b/OpenRA.Mods.RA/Traits/Minelayer.cs
index 799266fe00..ab933a47a8 100644
--- a/OpenRA.Mods.RA/Traits/Minelayer.cs
+++ b/OpenRA.Mods.RA/Traits/Minelayer.cs
@@ -26,7 +26,7 @@ namespace OpenRA.Mods.RA.Traits
 
 		public readonly string AmmoPoolName = "primary";
 
-		public readonly float MinefieldDepth = 1.5f;
+		public readonly WDist MinefieldDepth = new WDist(1536);
 
 		public object Create(ActorInitializer init) { return new Minelayer(init.Self); }
 	}
@@ -97,7 +97,7 @@ namespace OpenRA.Mods.RA.Traits
 			}
 		}
 
-		static IEnumerable<CPos> GetMinefieldCells(CPos start, CPos end, float depth)
+		static IEnumerable<CPos> GetMinefieldCells(CPos start, CPos end, WDist depth)
 		{
 			var mins = CPos.Min(start, end);
 			var maxs = CPos.Max(start, end);
@@ -113,7 +113,7 @@ namespace OpenRA.Mods.RA.Traits
 
 			for (var i = mins.X; i <= maxs.X; i++)
 				for (var j = mins.Y; j <= maxs.Y; j++)
-					if (Math.Abs(q.X * i + q.Y * j + c) < depth)
+					if (Math.Abs(q.X * i + q.Y * j + c) * 1024 < depth.Length)
 						yield return new CPos(i, j);
 		}