diff --git a/src/shared.pri b/src/shared.pri
index 1167a2229..be762cd22 100644
--- a/src/shared.pri
+++ b/src/shared.pri
@@ -4,6 +4,7 @@ TEMPLATE      = lib
 CONFIG       += plugin
 QT += opengl
 QT += xml
+QT += xmlpatterns
 QT += script
 
 VCGDIR  = ../../../../vcglib