--- dovecot-1.2.5/src/plugins/quota/quota.c.org	2009-09-15 20:12:12.000000000 +0200
+++ dovecot-1.2.5/src/plugins/quota/quota.c	2009-09-15 20:12:27.000000000 +0200
@@ -444,7 +444,7 @@
 	bool found;
 
 	if (!root->set->force_default_rule) {
-		if (root->backend.v.init_limits(root) < 0)
+		if (root->backend.v.init_limits && root->backend.v.init_limits(root) < 0)
 			return -1;
 	}
 
