diff --git a/lib/config-win32.h b/lib/config-win32.h
index c734d7c48e4d7c4c25495a95fbd31f4bb607b98a..7eca94e44ba7586fd993f2edd9f522d5b37054e0 100644
--- a/lib/config-win32.h
+++ b/lib/config-win32.h
@@ -45,7 +45,7 @@
 /* #define TIME_WITH_SYS_TIME 1 */
 
 /* Define cpu-machine-OS */
-#define OS "win32"
+#define OS "i386-pc-win32"
 
 /* The number of bytes in a long double.  */
 #define SIZEOF_LONG_DOUBLE 16