diff --git a/include/sys/ttydefaults.h b/include/sys/ttydefaults.h
index e5d4da2b..edb55bc4 100644
--- a/include/sys/ttydefaults.h
+++ b/include/sys/ttydefaults.h
@@ -9,13 +9,8 @@
 #define CTRL(x) ((x)&037)
 #define CEOF CTRL('d')
 
-#ifdef _POSIX_VDISABLE
-#define CEOL _POSIX_VDISABLE
-#define CSTATUS _POSIX_VDISABLE
-#else
 #define CEOL '\0'
 #define CSTATUS '\0'
-#endif
 
 #define CERASE 0177
 #define CINTR CTRL('c')