diff -Nru -I '$FreeBSD.*$' /zbigone/src/ports-playground/databases/qt4-ibase-plugin/Makefile /zbigone/src/area51/trunk/QT/databases/qt4-ibase-plugin/Makefile
--- databases/qt4-ibase-plugin/Makefile	2016-05-25 13:00:49.476801000 +0200
+++ databases/qt4-ibase-plugin/Makefile	2016-05-01 18:46:49.253950000 +0200
@@ -5,6 +5,6 @@
 
 COMMENT=	Qt InterBase/Firebird database plugin
 DB=		ibase
-USES+=		firebird
+USES=		firebird
 
 .include "${.CURDIR:H:H}/devel/qt4/Makefile.sqldrivers"