diff --git a/OMNotebook/OMNotebookGUI/OMNotebookGUI.pro b/OMNotebook/OMNotebookGUI/OMNotebookGUI.pro
index 9fdfb7e285f..4b65f2091bf 100644
--- a/OMNotebook/OMNotebookGUI/OMNotebookGUI.pro
+++ b/OMNotebook/OMNotebookGUI/OMNotebookGUI.pro
@@ -69,7 +69,8 @@ SOURCES += \
     ../OMSketch/Draw_Arrow.cpp \
     ../OMSketch/Draw_Arc.cpp \
     ../OMSketch/CustomDailog.cpp \
-    ../../OMEdit/OMEditGUI/StringHandler.cpp
+    ../../OMEdit/OMEditGUI/StringHandler.cpp \
+    ../../OMEdit/OMEditGUI/Helper.cpp
 
 HEADERS += \
     omc_communication.h \
@@ -149,7 +150,8 @@ HEADERS += \
     ../OMSketch/Draw_Arc.h \
     ../OMSketch/CustomDialog.h \
     ../OMSketch/basic.h \
-    ../../OMEdit/OMEditGUI/StringHandler.h
+    ../../OMEdit/OMEditGUI/StringHandler.h \
+    ../../OMEdit/OMEditGUI/Helper.h
 
 FORMS += ImageSizeDlg.ui \
     OtherDlg.ui \