diff --git a/OpenRA.Mods.RA/TakeCover.cs b/OpenRA.Mods.RA/TakeCover.cs
index 1dfb49c38e..3334ef30b6 100644
--- a/OpenRA.Mods.RA/TakeCover.cs
+++ b/OpenRA.Mods.RA/TakeCover.cs
@@ -22,7 +22,7 @@ namespace OpenRA.Mods.RA
 		public readonly int ProneTime = 100;
 
 		[Desc("Prone movement speed as a percentage of the normal speed.")]
-		public readonly int ProneSpeed = 50;
+		public readonly int SpeedModifier = 50;
 
 		public readonly WVec ProneOffset = new WVec(85, 0, -171);
 
@@ -68,7 +68,7 @@ namespace OpenRA.Mods.RA
 
 		public int GetSpeedModifier()
 		{
-			return IsProne ? Info.ProneSpeed : 100;
+			return IsProne ? Info.SpeedModifier : 100;
 		}
 	}
 
diff --git a/OpenRA.Utility/UpgradeRules.cs b/OpenRA.Utility/UpgradeRules.cs
index 652890ec81..c3aa956087 100644
--- a/OpenRA.Utility/UpgradeRules.cs
+++ b/OpenRA.Utility/UpgradeRules.cs
@@ -424,7 +424,10 @@ namespace OpenRA.Utility
 						ConvertFloatArrayToPercentArray(ref node.Value.Value);
 
 					if (depth == 2 && node.Key == "ProneSpeed" && parentKey == "TakeCover")
+					{
+						node.Key = "SpeedModifier";
 						ConvertFloatArrayToPercentArray(ref node.Value.Value);
+					}
 
 					if (depth == 2 && node.Key == "SpeedModifier" && parentKey == "GainsStatUpgrades")
 						ConvertFloatArrayToPercentArray(ref node.Value.Value);