diff --git a/configure.ac b/configure.ac
index b92329a0..28acee82 100644
--- a/configure.ac
+++ b/configure.ac
@@ -51,7 +51,7 @@ AC_CHECK_HEADER([shadow.h],,[AC_MSG_ERROR([You need a libc with shadow.h])])
 AC_CHECK_FUNCS(arc4random_buf l64a fchmod fchown fsync futimes \
 	gethostname getentropy getrandom getspnam gettimeofday getusershell \
 	getutent initgroups lchown lckpwdf lstat lutimes \
-	setgroups sigaction strchr updwtmp updwtmpx innetgr getpwnam_r \
+	setgroups sigaction updwtmp updwtmpx innetgr getpwnam_r \
 	getpwuid_r getgrnam_r getgrgid_r getspnam_r getaddrinfo ruserok \
 	dlopen memset_s explicit_bzero)
 AC_SYS_LARGEFILE