Index: src_plugins/lib_gtk_common/wt_layersel.c
===================================================================
--- src_plugins/lib_gtk_common/wt_layersel.c	(revision 8664)
+++ src_plugins/lib_gtk_common/wt_layersel.c	(revision 8665)
@@ -248,7 +248,7 @@
 			}
 
 			ls->com->invalidate_all();
-			if (event->button.button == 3)
+			if ((event->button.button == 3) && (lsl->lid >= 0))
 				pcb_hid_actionl("Popup", "layer", NULL);
 			break;
 	}
@@ -271,7 +271,7 @@
 				ls->com->invalidate_all();
 				pcb_gtk_layersel_vis_update(ls); /* need to do a full redraw because of side effects of special layer selections (e.g. Rats') */
 			}
-			if (event->button.button == 3)
+			if ((event->button.button == 3) && (lsl->lid >= 0))
 				pcb_hid_actionl("Popup", "layer", NULL);
 			break;
 	}