diff --git a/include/stddef.h b/include/stddef.h
--- a/include/stddef.h
+++ b/include/stddef.h
@@ -41,13 +41,6 @@
 #define	_PTRDIFF_T_DECLARED
 #endif
 
-#if __BSD_VISIBLE
-#ifndef _RUNE_T_DECLARED
-typedef	__rune_t	rune_t;
-#define	_RUNE_T_DECLARED
-#endif
-#endif
-
 #ifndef _SIZE_T_DECLARED
 typedef	__size_t	size_t;
 #define	_SIZE_T_DECLARED
diff --git a/include/stdlib.h b/include/stdlib.h
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -38,13 +38,6 @@
 
 __NULLABILITY_PRAGMA_PUSH
 
-#if __BSD_VISIBLE
-#ifndef _RUNE_T_DECLARED
-typedef	__rune_t	rune_t;
-#define	_RUNE_T_DECLARED
-#endif
-#endif
-
 #ifndef _SIZE_T_DECLARED
 typedef	__size_t	size_t;
 #define	_SIZE_T_DECLARED