diff --git a/src/Umbraco.Core/Persistence/LocalDb.cs b/src/Umbraco.Core/Persistence/LocalDb.cs
index 4dcc56a9a4..35f3ae750e 100644
--- a/src/Umbraco.Core/Persistence/LocalDb.cs
+++ b/src/Umbraco.Core/Persistence/LocalDb.cs
@@ -142,7 +142,7 @@ namespace Umbraco.Core.Persistence
         {
             EnsureAvailable();
             var instances = GetInstances();
-            return instances != null && instances.Contains(instanceName);
+            return instances != null && instances.Contains(instanceName, StringComparer.OrdinalIgnoreCase);
         }
 
         /// <summary>