diff --git a/backend_qt4/backend_qt4.pro b/backend_qt4/backend_qt4.pro
index 5340ca10..ce74aeed 100644
--- a/backend_qt4/backend_qt4.pro
+++ b/backend_qt4/backend_qt4.pro
@@ -88,6 +88,7 @@ SOURCES += ../backend/2of5.c \
            ../backend/dmatrix.c \
            ../backend/dotcode.c \
            ../backend/eci.c \
+           ../backend/emf.c \
            ../backend/gif.c \
            ../backend/gridmtx.c \
            ../backend/gs1.c \
@@ -108,6 +109,7 @@ SOURCES += ../backend/2of5.c \
            ../backend/rss.c \
            ../backend/svg.c \
            ../backend/telepen.c \
+           ../backend/tif.c \
            ../backend/upcean.c \
            ../backend/qr.c \
            ../backend/dllversion.c \