diff -uNr busybox-1.31.1/include/platform.h busybox-1.31.1.mod/include/platform.h
--- busybox-1.31.1/include/platform.h	2019-06-10 13:50:53.000000000 +0300
+++ busybox-1.31.1.mod/include/platform.h	2019-11-12 02:43:11.833640516 +0200
@@ -526,7 +526,9 @@
 #  undef HAVE_STPCPY
 # endif
 # undef HAVE_MEMPCPY
-# undef HAVE_STRCHRNUL
+# if __ANDROID_API__ < 24
+#  undef HAVE_STRCHRNUL
+# endif
 # undef HAVE_STRVERSCMP
 # undef HAVE_UNLOCKED_LINE_OPS
 # undef HAVE_NET_ETHERNET_H