diff --git a/lib/config-dos.h b/lib/config-dos.h
index 88a10c966..cce5e8106 100644
--- a/lib/config-dos.h
+++ b/lib/config-dos.h
@@ -178,8 +178,7 @@
 #endif
 
 #ifdef MSDOS  /* Watt-32 */
-  #define HAVE_CLOSESOCKET_CAMEL  1
-  #define CloseSocket(s)          close_s((s))
+  #define HAVE_CLOSE_S    1
 #endif
 
 #undef word