diff --git a/mcs/class/corlib/System.Resources/ChangeLog b/mcs/class/corlib/System.Resources/ChangeLog
index 85b7b82e143f6..41050c3fb0d68 100644
--- a/mcs/class/corlib/System.Resources/ChangeLog
+++ b/mcs/class/corlib/System.Resources/ChangeLog
@@ -1,3 +1,8 @@
+2009-03-06 Gonzalo Paniagua Javier <gonzalo@novell.com>
+
+	* ResourceSet.cs: for custom resource sets without a reader, pretende
+	that's we've already read the stream.
+
 2009-02-27 Gonzalo Paniagua Javier <gonzalo@novell.com>
 
 	* ResourceSet.cs: populating the resource should be locked because the
diff --git a/mcs/class/corlib/System.Resources/ResourceSet.cs b/mcs/class/corlib/System.Resources/ResourceSet.cs
index ceb3c2036808d..9ad0aea13b10c 100644
--- a/mcs/class/corlib/System.Resources/ResourceSet.cs
+++ b/mcs/class/corlib/System.Resources/ResourceSet.cs
@@ -63,6 +63,7 @@ public class ResourceSet : IDisposable
 		protected ResourceSet ()
 		{
 			Table = new Hashtable ();
+			resources_read = true;
 		}
 
 		public ResourceSet (IResourceReader reader)
@@ -211,15 +212,15 @@ public virtual string GetString (string name, bool ignoreCase)
 
 		protected virtual void ReadResources ()
 		{
+			if (resources_read)
+				return;
+
 			if (Reader == null)
 #if NET_2_0
 				throw new ObjectDisposedException ("ResourceSet is closed.");
 #else
 				throw new InvalidOperationException ("ResourceSet is closed.");
 #endif
-			if (resources_read)
-				return;
-
 			lock (Table) {
 				if (resources_read)
 					return;