diff --git a/configure.ac b/configure.ac
index a89105b8..9598ece0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -52,7 +52,7 @@ AC_CHECK_FUNCS(arc4random_buf l64a fchmod fchown fsync futimes \
 	getentropy getrandom getspnam getusershell \
 	getutent initgroups lchown lckpwdf lstat lutimes \
 	setgroups updwtmp updwtmpx innetgr getpwnam_r \
-	getpwuid_r getgrnam_r getgrgid_r getspnam_r ruserok \
+	getpwuid_r getgrnam_r getgrgid_r getspnam_r \
 	memset_s explicit_bzero)
 AC_SYS_LARGEFILE