diff --git a/abclib.dsp b/abclib.dsp
index d460427cf..d538db292 100644
--- a/abclib.dsp
+++ b/abclib.dsp
@@ -675,6 +675,10 @@ SOURCE=.\src\base\io\ioWriteDot.c
 # End Source File
 # Begin Source File
 
+SOURCE=.\src\base\io\ioWriteEdgelist.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\src\base\io\ioWriteEqn.c
 # End Source File
 # Begin Source File