diff --git a/src/EventStore.ClusterNode/Program.cs b/src/EventStore.ClusterNode/Program.cs
index 141e4a29ab4..0630e9de387 100644
--- a/src/EventStore.ClusterNode/Program.cs
+++ b/src/EventStore.ClusterNode/Program.cs
@@ -84,7 +84,11 @@ public class Program : ProgramBase<ClusterNodeOptions> {
 			var dbPath = opts.Db;
 
 			if (!opts.MemDb) {
-				_dbLock = new ExclusiveDbLock(dbPath);
+				var absolutePath = Path.GetFullPath(dbPath);
+				if(Runtime.IsWindows)
+					absolutePath = absolutePath.ToLower();
+
+				_dbLock = new ExclusiveDbLock(absolutePath);
 				if (!_dbLock.Acquire())
 					throw new Exception(string.Format("Couldn't acquire exclusive lock on DB at '{0}'.", dbPath));
 			}