Index: src_plugins/export_png/export_png.c
===================================================================
--- src_plugins/export_png/export_png.c	(revision 643)
+++ src_plugins/export_png/export_png.c	(revision 644)
@@ -290,7 +290,7 @@
 {
 	fprintf(stderr, "\npng exporter command line arguments:\n\n");
 	rnd_hid_usage(png_attribute_list, sizeof(png_attribute_list) / sizeof(png_attribute_list[0]));
-	fprintf(stderr, "\nUsage: camv-rnd [generic_options] -x png [png options] foo.pcb\n\n");
+	fprintf(stderr, "\nUsage: camv-rnd [generic_options] -x png [png options] foo.gbr\n\n");
 	return 0;
 }