diff --git a/configure.in b/configure.in
index 4bb992191c25a37b33ecf25df3e87ad99622d4c9..0a699ecd70cf842bde1e91b36a1a290fb4755b6e 100644
--- a/configure.in
+++ b/configure.in
@@ -365,7 +365,7 @@ AC_CHECK_HEADERS(zlib.h, , AC_MSG_ERROR(Zlib header (zlib.h) not found. Tor requ
 
 dnl These headers are not essential
 
-AC_CHECK_HEADERS(stdint.h sys/types.h inttypes.h sys/param.h sys/wait.h limits.h sys/limits.h netinet/in.h arpa/inet.h machine/limits.h syslog.h sys/time.h sys/resource.h stddef.h inttypes.h utime.h sys/utime.h sys/mman.h alloca.h)
+AC_CHECK_HEADERS(stdint.h sys/types.h inttypes.h sys/param.h sys/wait.h limits.h sys/limits.h netinet/in.h arpa/inet.h machine/limits.h syslog.h sys/time.h sys/resource.h inttypes.h utime.h sys/utime.h sys/mman.h)
 
 AC_CHECK_HEADERS(net/if.h, [net_if_found=1], [net_if_found=0],
 [#ifdef HAVE_SYS_TYPES_H
@@ -390,7 +390,7 @@ AC_CHECK_HEADERS(linux/netfilter_ipv4.h,
 #include <sys/socket.h>
 #endif])
 
-AC_CHECK_FUNCS(gettimeofday ftime socketpair uname inet_aton strptime getrlimit setrlimit strlcat strlcpy strtoull getpwnam getpwuid ftello getaddrinfo localtime_r gmtime_r event_get_version event_get_method event_set_log_callback memmem mmap strtok_r)
+AC_CHECK_FUNCS(gettimeofday ftime socketpair uname inet_aton strptime getrlimit strlcat strlcpy strtoull ftello getaddrinfo localtime_r gmtime_r event_get_version event_get_method event_set_log_callback memmem strtok_r)
 
 if test $enable_threads = "yes"; then
   AC_CHECK_HEADERS(pthread.h)