Index: main_act.c
===================================================================
--- main_act.c	(revision 26792)
+++ main_act.c	(revision 26793)
@@ -178,7 +178,7 @@
 		for (i = 0; hl[i]; i++) {
 			if ((hl[i]->usage != NULL) && (strcmp(topic, hl[i]->name) == 0)) {
 				PCB_ACT_MAY_CONVARG(2, FGW_STR, PrintUsage, subt = argv[2].val.str);
-				PCB_ACT_IRES(hl[i]->usage(subt));
+				PCB_ACT_IRES(hl[i]->usage(hl[i], subt));
 				return 0;
 			}
 		}