diff --git a/configure/os/CONFIG.win32-x86-mingw.win32-x86-mingw-debug b/configure/os/CONFIG.win32-x86-mingw.win32-x86-mingw-debug
index 7c1c73004..304eec53a 100644
--- a/configure/os/CONFIG.win32-x86-mingw.win32-x86-mingw-debug
+++ b/configure/os/CONFIG.win32-x86-mingw.win32-x86-mingw-debug
@@ -7,8 +7,10 @@
 # Sites may override these definitions in CONFIG_SITE.win32-x86-mingw.win32-x86-mingw-debug
 #-------------------------------------------------------
 
-include $(CONFIG)/os/CONFIG.Common.win32-x86-mingw
-include $(CONFIG)/os/CONFIG.win32-x86-mingw.win32-x86-mingw
+-include $(CONFIG)/os/CONFIG.Common.win32-x86-mingw
+-include $(CONFIG)/os/CONFIG.win32-x86-mingw.win32-x86-mingw
+-include $(CONFIG)/os/CONFIG_SITE.Common.win32-x86-mingw
+-include $(CONFIG)/os/CONFIG_SITE.win32-x86-mingw.win32-x86-mingw
 
 BUILD_CLASS = HOST