diff --git a/lib/isc/win32/libisc.mak b/lib/isc/win32/libisc.mak
index 3ff26ef6b5..526cf6c145 100644
--- a/lib/isc/win32/libisc.mak
+++ b/lib/isc/win32/libisc.mak
@@ -1306,12 +1306,14 @@ SOURCE=..\crc64.c
 
 
 "$(INTDIR)\crc64.obj" : $(SOURCE) "$(INTDIR)"
+	$(CPP) $(CPP_PROJ) $(SOURCE)
 
 
 !ELSEIF  "$(CFG)" == "libisc - Win32 Debug"
 
 
 "$(INTDIR)\crc64.obj"	"$(INTDIR)\crc64.sbr" : $(SOURCE) "$(INTDIR)"
+	$(CPP) $(CPP_PROJ) $(SOURCE)
 
 
 !ENDIF