diff --git a/src/xpdev/xpdev.dsp b/src/xpdev/xpdev.dsp
index cf6ea4812e77d588db8fa36c8082d446a4693c2c..25fc48125df79a8aca0af12d67dfd7592abcef41 100644
--- a/src/xpdev/xpdev.dsp
+++ b/src/xpdev/xpdev.dsp
@@ -120,5 +120,9 @@ SOURCE=.\sockwrap.c
 
 SOURCE=.\str_list.c
 # End Source File
+# Begin Source File
+
+SOURCE=.\xpprintf.c
+# End Source File
 # End Target
 # End Project
diff --git a/src/xpdev/xpdev_mt.dsp b/src/xpdev/xpdev_mt.dsp
index 28f559a1644470f25cb7f131d8b7f2dde4b905a8..013150cb0526252accc4e135466f5f452305bb41 100644
--- a/src/xpdev/xpdev_mt.dsp
+++ b/src/xpdev/xpdev_mt.dsp
@@ -128,5 +128,9 @@ SOURCE=.\str_list.c
 
 SOURCE=.\threadwrap.c
 # End Source File
+# Begin Source File
+
+SOURCE=.\xpprintf.c
+# End Source File
 # End Target
 # End Project