Index: usr.sbin/jls/jls.c
===================================================================
--- usr.sbin/jls/jls.c
+++ usr.sbin/jls/jls.c
@@ -509,8 +509,8 @@
 
 	/* An empty string needs quoting. */
 	if (!*p) {
-		asprintf(&param_name_value, "{k:%s}{d:%s/\"\"}", name, name);
-		xo_emit(param_name_value);
+		asprintf(&param_name_value, "{:%s/%%s}", name);
+		xo_emit(param_name_value, "\"\"");
 		free(param_name_value);
 		return;
 	}