diff --git a/abclib.dsp b/abclib.dsp
index 1938c5812..1b55591af 100644
--- a/abclib.dsp
+++ b/abclib.dsp
@@ -4367,6 +4367,10 @@ SOURCE=.\src\proof\abs\absRef.h
 # End Source File
 # Begin Source File
 
+SOURCE=.\src\proof\abs\absRefSelect.c
+# End Source File
+# Begin Source File
+
 SOURCE=.\src\proof\abs\absUtil.c
 # End Source File
 # Begin Source File