diff --git a/configure.in b/configure.in
index 021f485d..c1d617e3 100644
--- a/configure.in
+++ b/configure.in
@@ -411,7 +411,7 @@ AC_FUNC_ALLOCA
 AC_CHECK_FUNCS(waitpid wait4 getcwd strdup strerror chown chmod mknod mkfifo)
 AC_CHECK_FUNCS(fchmod fstat strchr readlink link utime utimes strftime)
 AC_CHECK_FUNCS(memmove lchown vsnprintf snprintf asprintf setsid glob strpbrk)
-AC_CHECK_FUNCS(strlcat strlcpy strtol mtrace mallinfo setgroups)
+AC_CHECK_FUNCS(strlcat strlcpy strtol mtrace mallinfo setgroups geteuid)
 
 AC_CACHE_CHECK([for working socketpair],rsync_cv_HAVE_SOCKETPAIR,[
 AC_TRY_RUN([