diff --git a/build/org.eclipse.cdt.make.ui/src/org/eclipse/cdt/make/ui/TargetBuild.java b/build/org.eclipse.cdt.make.ui/src/org/eclipse/cdt/make/ui/TargetBuild.java
index 0717911f3fd..be2be3523af 100644
--- a/build/org.eclipse.cdt.make.ui/src/org/eclipse/cdt/make/ui/TargetBuild.java
+++ b/build/org.eclipse.cdt.make.ui/src/org/eclipse/cdt/make/ui/TargetBuild.java
@@ -19,6 +19,7 @@ import org.eclipse.cdt.make.internal.ui.MakeUIPlugin;
 import org.eclipse.cdt.make.internal.ui.preferences.MakePreferencePage;
 import org.eclipse.core.resources.IFile;
 import org.eclipse.core.resources.IWorkspaceRunnable;
+import org.eclipse.core.resources.ResourcesPlugin;
 import org.eclipse.core.runtime.CoreException;
 import org.eclipse.core.runtime.IProgressMonitor;
 import org.eclipse.core.runtime.IStatus;
@@ -104,6 +105,10 @@ public class TargetBuild {
 				}
 				return Status.OK_STATUS;
 			}
+			
+			public boolean belongsTo(Object family) {
+				return ResourcesPlugin.FAMILY_MANUAL_BUILD == family;
+			}
 		};
 		targetJob.schedule();