diff --git a/pjlib/build/pjlib.dsp b/pjlib/build/pjlib.dsp
index 0ee608a..7440510 100644
--- a/pjlib/build/pjlib.dsp
+++ b/pjlib/build/pjlib.dsp
@@ -466,6 +466,10 @@
 # End Source File
 # Begin Source File
 
+SOURCE=..\include\pj\config_site_sample.h
+# End Source File
+# Begin Source File
+
 SOURCE=..\include\pj\ctype.h
 # End Source File
 # Begin Source File