diff --git a/OpenRA.Mods.Common/Traits/CustomBuildTimeValue.cs b/OpenRA.Mods.Common/Traits/CustomBuildTimeValue.cs
index 4eae571a39..9c81615fc5 100644
--- a/OpenRA.Mods.Common/Traits/CustomBuildTimeValue.cs
+++ b/OpenRA.Mods.Common/Traits/CustomBuildTimeValue.cs
@@ -25,6 +25,8 @@ namespace OpenRA.Mods.Common.Traits
 
 	public static class CustomBuildTimeValueExts
 	{
+		const int FramesPerMin = 25 * 60;
+
 		public static int GetBuildTime(this ActorInfo a)
 		{
 			var csv = a.TraitInfoOrDefault<CustomBuildTimeValueInfo>();
@@ -32,11 +34,7 @@ namespace OpenRA.Mods.Common.Traits
 				return csv.Value;
 
 			var cost = a.HasTraitInfo<ValuedInfo>() ? a.TraitInfo<ValuedInfo>().Cost : 0;
-			var time = cost
-							* (25 * 60) /* frames per min */
-							/ 1000;
-			return
-				time;
+			return cost * FramesPerMin / 1000;
 		}
 	}
 }