--- a/ship_cmd.c	Tue Nov 29 22:04:02 2005 +0000
+++ b/ship_cmd.c	Tue Nov 29 22:29:59 2005 +0000
@@ -1056,7 +1056,7 @@
 
 	/* Check cargo */
 	if (!ShipVehInfo(v->engine_type)->refittable) return CMD_ERROR;
-	if (new_cid > NUM_CARGO || !CanRefitTo(v, new_cid)) return CMD_ERROR;
+	if (new_cid > NUM_CARGO || !CanRefitTo(v->engine_type, new_cid)) return CMD_ERROR;
 
 	SET_EXPENSES_TYPE(EXPENSES_SHIP_RUN);