diff --git a/doc/examples/addressbook-sdk/part5/part5.pro b/doc/examples/addressbook-sdk/part5/part5.pro
index a8618f0877b3330252846aa84453b528e6aa50cf..f41e5e85f19c57a1000fba7c147e718c8e603067 100644
--- a/doc/examples/addressbook-sdk/part5/part5.pro
+++ b/doc/examples/addressbook-sdk/part5/part5.pro
@@ -5,10 +5,8 @@ TARGET = part5
 TEMPLATE = app
 SOURCES += main.cpp \
     addressbook.cpp \
-    finddialog.cpp \
     finddialog.cpp
 HEADERS += addressbook.h \
-    finddialog.h \
     finddialog.h
 FORMS += addressbook.ui \
     finddialog.ui