diff --git a/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/IWorkspaceConfigFactory.java b/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/IWorkspaceConfigFactory.java
index aa85e8951..09ff9e85a 100644
--- a/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/IWorkspaceConfigFactory.java
+++ b/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/IWorkspaceConfigFactory.java
@@ -14,7 +14,10 @@ import org.eclipse.xtext.workspace.IWorkspaceConfig;
 /**
  * @author Jan Koehnlein - Initial contribution and API
  * @since 2.11
+ * @deprecated use the {@link IMultiRootWorkspaceConfigFactory} instead.
+ * 			   This interface is scheduled to be removed with 2.22.
  */
+@Deprecated//(forRemoval=true)
 public interface IWorkspaceConfigFactory {
 	/**
 	 * Create a workspace config at the given location.
diff --git a/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/ProjectWorkspaceConfigFactory.java b/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/ProjectWorkspaceConfigFactory.java
index 03d7ba763..22b096ecf 100644
--- a/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/ProjectWorkspaceConfigFactory.java
+++ b/org.eclipse.xtext.ide/src/org/eclipse/xtext/ide/server/ProjectWorkspaceConfigFactory.java
@@ -18,7 +18,10 @@ import org.eclipse.xtext.workspace.WorkspaceConfig;
  *
  * @author Jan Koehnlein - Initial contribution and API
  * @since 2.11
+ * @deprecated use the {@link MultiRootWorkspaceConfigFactory} instead.
+ * 			   This class is scheduled to be removed with 2.22.
  */
+@Deprecated//(forRemoval=true)
 public class ProjectWorkspaceConfigFactory implements IWorkspaceConfigFactory {
 	@Override
 	public IWorkspaceConfig getWorkspaceConfig(URI workspaceBaseURI) {