diff --git a/src/sysdep.c b/src/sysdep.c
index 089fc74deb8..d916a695155 100644
--- a/src/sysdep.c
+++ b/src/sysdep.c
@@ -4552,15 +4552,9 @@ does the same thing as `current-time'.  */)
 # include <wctype.h>
 
 # include <locale.h>
-# ifndef LC_COLLATE
-#  define LC_COLLATE 0
-# endif
 # ifndef LC_COLLATE_MASK
 #  define LC_COLLATE_MASK 0
 # endif
-# ifndef LC_CTYPE
-#  define LC_CTYPE 0
-# endif
 # ifndef LC_CTYPE_MASK
 #  define LC_CTYPE_MASK 0
 # endif