diff --git a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/actions/CBreakpointPropertiesHandler.java b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/actions/CBreakpointPropertiesHandler.java
index ef5d0b25b6a..3035a3c9987 100644
--- a/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/actions/CBreakpointPropertiesHandler.java
+++ b/debug/org.eclipse.cdt.debug.ui/src/org/eclipse/cdt/debug/internal/ui/actions/CBreakpointPropertiesHandler.java
@@ -64,6 +64,7 @@ public class CBreakpointPropertiesHandler extends AbstractHandler {
                 }
     
                 public void setSelection( ISelection selection ) {
+                    assert false; // Not supported
                 }
             } );
             propertyAction.run();