diff --git a/configure/os/CONFIG.cygwin-x86.cygwin-x86-debug b/configure/os/CONFIG.cygwin-x86.cygwin-x86-debug
index 3a7f3c2b9..67f380a9d 100644
--- a/configure/os/CONFIG.cygwin-x86.cygwin-x86-debug
+++ b/configure/os/CONFIG.cygwin-x86.cygwin-x86-debug
@@ -7,8 +7,10 @@
 # Sites may override these definitions in CONFIG_SITE.cygwin-x86.cygwin-x86-debug
 #-------------------------------------------------------
 
-include $(CONFIG)/os/CONFIG.Common.cygwin-x86
-include $(CONFIG)/os/CONFIG.cygwin-x86.cygwin-x86
+-include $(CONFIG)/os/CONFIG.Common.cygwin-x86
+-include $(CONFIG)/os/CONFIG.cygwin-x86.cygwin-x86
+-include $(CONFIG)/os/CONFIG_SITE.Common.cygwin-x86
+-include $(CONFIG)/os/CONFIG_SITE.cygwin-x86.cygwin-x86
 
 BUILD_CLASS = HOST