diff --git a/win_build/boinc_gui/boinc_gui.dsp b/win_build/boinc_gui/boinc_gui.dsp
index ee64bc4855..a9ba1635c7 100755
--- a/win_build/boinc_gui/boinc_gui.dsp
+++ b/win_build/boinc_gui/boinc_gui.dsp
@@ -362,6 +362,10 @@ SOURCE=..\..\Client\win\Win_net.h
 # End Source File
 # Begin Source File
 
+SOURCE=..\..\client\win\win_util.h
+# End Source File
+# Begin Source File
+
 SOURCE=..\..\Client\win\windows_cpp.h
 # End Source File
 # Begin Source File