diff --git a/BizHawk.MultiClient/tools/Watch/RamSearchEngine.cs b/BizHawk.MultiClient/tools/Watch/RamSearchEngine.cs
index dafbf9fe61..dedf50f2b1 100644
--- a/BizHawk.MultiClient/tools/Watch/RamSearchEngine.cs
+++ b/BizHawk.MultiClient/tools/Watch/RamSearchEngine.cs
@@ -77,10 +77,9 @@ namespace BizHawk.MultiClient
 
 		public void Start()
 		{
-			_watchList.Clear();
 			_history.Clear();
-
 			var domain = _settings.Domain;
+			_watchList = new List<IMiniWatch>(domain.Size);
 
 			switch (_settings.Size)
 			{