diff --git a/pjlib/build/pjlib.dsp b/pjlib/build/pjlib.dsp
index 39df8bc..bd841f7 100644
--- a/pjlib/build/pjlib.dsp
+++ b/pjlib/build/pjlib.dsp
@@ -110,6 +110,11 @@
 # End Source File
 # Begin Source File
 
+SOURCE=..\src\pj\ip_helper_generic.c
+# PROP Exclude_From_Build 1
+# End Source File
+# Begin Source File
+
 SOURCE=..\src\pj\log_writer_printk.c
 # PROP Exclude_From_Build 1
 # End Source File
@@ -254,6 +259,10 @@
 # End Source File
 # Begin Source File
 
+SOURCE=..\src\pj\ip_helper_win32.c
+# End Source File
+# Begin Source File
+
 SOURCE=..\src\pj\list.c
 # End Source File
 # Begin Source File
@@ -518,6 +527,10 @@
 # End Source File
 # Begin Source File
 
+SOURCE=..\include\pj\ip_helper.h
+# End Source File
+# Begin Source File
+
 SOURCE=..\include\pj\list.h
 # End Source File
 # Begin Source File