Index: trunk/src/org/openstreetmap/josm/actions/AddImageryLayerAction.java
===================================================================
--- trunk/src/org/openstreetmap/josm/actions/AddImageryLayerAction.java	(revision 11180)
+++ trunk/src/org/openstreetmap/josm/actions/AddImageryLayerAction.java	(revision 11181)
@@ -75,5 +75,5 @@
             }
         } catch (IllegalArgumentException ex) {
-            if (ex.getMessage() == null || ex.getMessage().isEmpty()) {
+            if (ex.getMessage() == null || ex.getMessage().isEmpty() || GraphicsEnvironment.isHeadless()) {
                 throw ex;
             } else {