diff --git a/libc/upstream-openbsd/android/include/openbsd-compat.h b/libc/upstream-openbsd/android/include/openbsd-compat.h
index 8618e31..f00d91a 100644
--- a/libc/upstream-openbsd/android/include/openbsd-compat.h
+++ b/libc/upstream-openbsd/android/include/openbsd-compat.h
@@ -17,6 +17,8 @@
 #ifndef _BIONIC_OPENBSD_COMPAT_H_included
 #define _BIONIC_OPENBSD_COMPAT_H_included
 
+#include <sys/cdefs.h>
+
 #define __USE_BSD
 
 /* OpenBSD's <ctype.h> uses these names, which conflicted with stlport.
@@ -34,4 +36,8 @@
 /* OpenBSD has this, but we can't really implement it correctly on Linux. */
 #define issetugid() 0
 
+/* LP32 NDK ctype.h contained references to these. */
+__LIBC64_HIDDEN__ extern const short *_tolower_tab_;
+__LIBC64_HIDDEN__ extern const short *_toupper_tab_;
+
 #endif