diff --git a/Barotrauma/BarotraumaShared/SharedSource/LuaCs/Cs/CsScriptLoader.cs b/Barotrauma/BarotraumaShared/SharedSource/LuaCs/Cs/CsScriptLoader.cs
index f078db7c4e..d63079eaad 100644
--- a/Barotrauma/BarotraumaShared/SharedSource/LuaCs/Cs/CsScriptLoader.cs
+++ b/Barotrauma/BarotraumaShared/SharedSource/LuaCs/Cs/CsScriptLoader.cs
@@ -91,7 +91,7 @@ public void SearchFolders()
 		public bool HasSources { get => sources.Count > 0; }
 
 		private enum SourceCategory { Shared, Server, Client };
-		private Regex rMaskPathValid = new Regex(@"^(((?!csharp)[^/])+/)+csharp(/(shared|client|server))?(/[^/]+)+\.cs$", RegexOptions.IgnoreCase | RegexOptions.Compiled);
+		private Regex rMaskPathValid = new Regex(@"^/?(((?!csharp)[^/])+/)+csharp(/(shared|client|server))?(/[^/]+)+\.cs$", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 		private Regex rMaskPathCategory1 = new Regex(@"/(shared|client|server)(/[^/]+)+\.cs$", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 		private Regex rMaskPathCategory2 = new Regex(@"^/(shared|client|server)", RegexOptions.IgnoreCase | RegexOptions.Compiled);
 		private void RunFolder(string folder)