diff --git a/PCbuild/pythoncore.dsp b/PCbuild/pythoncore.dsp
index b91355f22cc..b4b7a526849 100644
--- a/PCbuild/pythoncore.dsp
+++ b/PCbuild/pythoncore.dsp
@@ -330,6 +330,21 @@ SOURCE=..\Python\bltinmodule.c
 # End Source File
 # Begin Source File
 
+SOURCE=..\Objects\boolobject.c
+
+!IF  "$(CFG)" == "pythoncore - Win32 Release"
+
+!ELSEIF  "$(CFG)" == "pythoncore - Win32 Debug"
+
+!ELSEIF  "$(CFG)" == "pythoncore - Win32 Alpha Debug"
+
+!ELSEIF  "$(CFG)" == "pythoncore - Win32 Alpha Release"
+
+!ENDIF 
+
+# End Source File
+# Begin Source File
+
 SOURCE=..\Objects\bufferobject.c
 
 !IF  "$(CFG)" == "pythoncore - Win32 Release"