diff --git a/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/ISystemRegistry.java b/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/ISystemRegistry.java
index 7603bf528c5..1b7cefd99e9 100644
--- a/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/ISystemRegistry.java
+++ b/rse/plugins/org.eclipse.rse.core/src/org/eclipse/rse/core/model/ISystemRegistry.java
@@ -543,6 +543,33 @@ public interface ISystemRegistry extends ISchedulingRule {
 	 */
 	public IHost createHost(String systemType, String connectionName, String hostAddress, String description) throws Exception;
 	
+    /**
+     * Update an existing host given the new information.
+     * This method:
+     * <ul>
+     *  <li>calls the setXXX methods on the given host object, updating the information in it.
+     *  <li>save the host's host pool to disk
+     *  <li>fires an ISystemResourceChangeEvent event of type EVENT_CHANGE to all registered listeners
+     *  <li>if the system type or host name is changed, calls disconnect on each associated subsystem.
+     *       We must do this because a host name changes fundamentally affects the connection, 
+     *       rendering any information currently displayed under
+     *       that host obsolete.
+     * </ul>
+     * <p>
+     * @param host the host to be updated
+     * @param systemType system type matching one of the system type names defined via the
+     *                    systemTypes extension point.
+     * @param connectionName unique connection name.
+     * @param hostName ip name of host.
+     * @param description optional description of the host. Can be null.
+     * @param defaultUserId userId to use as the default for the subsystems under this host.
+     * @param defaultUserIdLocation one of the constants in {@link org.eclipse.rse.core.IRSEUserIdConstants}
+     *   that tells us where to set the user Id
+     */
+    public void updateHost(IHost host, String systemType, String connectionName,
+                                 String hostName, String description,
+                                 String defaultUserId, int defaultUserIdLocation);
+    
 	/**
 	 * Creates subsystems for a given host and subsystem configurations.
 	 * @param host the host.
diff --git a/rse/plugins/org.eclipse.rse.ui/model/org/eclipse/rse/model/ISystemRegistryUI.java b/rse/plugins/org.eclipse.rse.ui/model/org/eclipse/rse/model/ISystemRegistryUI.java
index b56d01d6d8d..c2994e07d4e 100644
--- a/rse/plugins/org.eclipse.rse.ui/model/org/eclipse/rse/model/ISystemRegistryUI.java
+++ b/rse/plugins/org.eclipse.rse.ui/model/org/eclipse/rse/model/ISystemRegistryUI.java
@@ -15,7 +15,6 @@
  ********************************************************************************/
 package org.eclipse.rse.model;
 
-import org.eclipse.rse.core.model.IHost;
 import org.eclipse.rse.core.model.ISystemRegistry;
 import org.eclipse.swt.dnd.Clipboard;
 
@@ -24,33 +23,6 @@ import org.eclipse.swt.dnd.Clipboard;
  */
 public interface ISystemRegistryUI extends ISystemRegistry {
 
-    /**
-     * Update an existing host given the new information.
-     * This method:
-     * <ul>
-     *  <li>calls the setXXX methods on the given host object, updating the information in it.
-     *  <li>save the host's host pool to disk
-     *  <li>fires an ISystemResourceChangeEvent event of type EVENT_CHANGE to all registered listeners
-     *  <li>if the system type or host name is changed, calls disconnect on each associated subsystem.
-     *       We must do this because a host name changes fundamentally affects the connection, 
-     *       rendering any information currently displayed under
-     *       that host obsolete.
-     * </ul>
-     * <p>
-     * @param host the host to be updated
-     * @param systemType system type matching one of the system type names defined via the
-     *                    systemTypes extension point.
-     * @param connectionName unique connection name.
-     * @param hostName ip name of host.
-     * @param description optional description of the host. Can be null.
-     * @param defaultUserId userId to use as the default for the subsystems under this host.
-     * @param defaultUserIdLocation one of the constants in {@link org.eclipse.rse.core.IRSEUserIdConstants}
-     *   that tells us where to set the user Id
-     */
-    public void updateHost(IHost host, String systemType, String connectionName,
-                                 String hostName, String description,
-                                 String defaultUserId, int defaultUserIdLocation);
-    
     /**
      * Returns the clipboard used for copy actions
      */
diff --git a/rse/plugins/org.eclipse.rse.ui/subsystems/org/eclipse/rse/core/subsystems/AbstractConnectorService.java b/rse/plugins/org.eclipse.rse.ui/subsystems/org/eclipse/rse/core/subsystems/AbstractConnectorService.java
index 558d2e630b6..2a568aba336 100644
--- a/rse/plugins/org.eclipse.rse.ui/subsystems/org/eclipse/rse/core/subsystems/AbstractConnectorService.java
+++ b/rse/plugins/org.eclipse.rse.ui/subsystems/org/eclipse/rse/core/subsystems/AbstractConnectorService.java
@@ -25,8 +25,6 @@ import org.eclipse.rse.core.RSECorePlugin;
 import org.eclipse.rse.core.model.IHost;
 import org.eclipse.rse.core.model.ISystemRegistry;
 import org.eclipse.rse.core.model.SystemSignonInformation;
-import org.eclipse.rse.model.ISystemRegistryUI;
-import org.eclipse.rse.ui.RSEUIPlugin;
 
 /**
  * This is a base class to make it easier to create connector service classes.
@@ -320,7 +318,7 @@ public abstract class AbstractConnectorService extends SuperAbstractConnectorSer
 		} else {
 			int whereToUpdate = IRSEUserIdConstants.USERID_LOCATION_HOST;
 			IHost host = subsystem.getHost();
-			ISystemRegistryUI sr = RSEUIPlugin.getDefault().getSystemRegistry();
+			ISystemRegistry sr = RSECorePlugin.getDefault().getSystemRegistry();
 			sr.updateHost(host, host.getSystemType(), host.getAliasName(), host.getHostName(), host.getDescription(), userId, whereToUpdate);
 		}
 	}