diff --git a/lib/curllib.dsp b/lib/curllib.dsp
index 5d7f6a644..a81480989 100644
--- a/lib/curllib.dsp
+++ b/lib/curllib.dsp
@@ -195,6 +195,10 @@ SOURCE=.\mprintf.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\multi.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\netrc.c
 # End Source File
 # Begin Source File