diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/IWorkingSetProjectConfiguration.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/IWorkingSetProjectConfiguration.java
index e3f1b53d2dc..614739d32a7 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/IWorkingSetProjectConfiguration.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/IWorkingSetProjectConfiguration.java
@@ -66,14 +66,6 @@ public interface IWorkingSetProjectConfiguration extends IWorkingSetConfiguratio
 	 */
 	String getSelectedConfigurationID();
 
-	/**
-	 * Sets the ID of the build configuration that is currently selected for my project.
-	 * 
-	 * @param id
-	 *            my selected build configuration ID
-	 */
-	void setSelectedConfigurationID(String id);
-
 	/**
 	 * <p>
 	 * Resolves my selected configuration reference to the C model's description handle for it.
@@ -166,5 +158,13 @@ public interface IWorkingSetProjectConfiguration extends IWorkingSetConfiguratio
 	 */
 	interface ISnapshot extends IWorkingSetProjectConfiguration, IWorkingSetConfigurationElement.ISnapshot {
 		IWorkingSetConfiguration.ISnapshot getWorkingSetConfiguration();
+
+		/**
+		 * Sets the ID of the build configuration that is currently selected for my project.
+		 * 
+		 * @param id
+		 *            my selected build configuration ID
+		 */
+		void setSelectedConfigurationID(String id);
 	}
 }
diff --git a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/WorkingSetProjectConfiguration.java b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/WorkingSetProjectConfiguration.java
index e79415b4b17..09cdf33c236 100644
--- a/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/WorkingSetProjectConfiguration.java
+++ b/core/org.eclipse.cdt.ui/src/org/eclipse/cdt/internal/ui/workingsets/WorkingSetProjectConfiguration.java
@@ -92,7 +92,7 @@ public class WorkingSetProjectConfiguration implements IWorkingSetProjectConfigu
 		return selectedConfiguration;
 	}
 
-	public void setSelectedConfigurationID(String id) {
+	protected void setSelectedConfigurationID(String id) {
 		this.selectedConfiguration = id;
 	}
 
@@ -265,6 +265,10 @@ public class WorkingSetProjectConfiguration implements IWorkingSetProjectConfigu
 			return resolveProject().getName();
 		}
 
+		public void setSelectedConfigurationID(String id) {
+			super.setSelectedConfigurationID(id);
+		}
+
 		@Override
 		public boolean isActive() {
 			return workspace.isActive(this);