Index: /trunk/src/org/openstreetmap/josm/gui/mappaint/RenderingCLI.java
===================================================================
--- /trunk/src/org/openstreetmap/josm/gui/mappaint/RenderingCLI.java	(revision 12935)
+++ /trunk/src/org/openstreetmap/josm/gui/mappaint/RenderingCLI.java	(revision 12936)
@@ -347,5 +347,5 @@
                     }
                     if (argMaxImageSize < 0) throw new IllegalArgumentException(
-                            tr("Expected integer number => 0 for option {0}, but got ''{1}''", "--max-image-size", getopt.getOptarg()));
+                            tr("Expected integer number >= 0 for option {0}, but got ''{1}''", "--max-image-size", getopt.getOptarg()));
                     break;
                 default: