1 files changed, 1 insertions, 1 deletions

diff --git a/configure.ac b/configure.ac
index 6478b67c..a332fca5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1057,7 +1057,7 @@ AC_CHECK_HEADERS([sys/types.h sys/time.h sys/msg.h time.h sys/mman.h sys/ioctl.h
   sys/socket.h sys/select.h netdb.h netinet/in.h netinet/ip.h netinet/tcp.h arpa/inet.h \
   endian.h machine/endian.h sys/endian.h sys/param.h sys/machine.h sys/byteorder.h machine/param.h sys/isa_defs.h \
   signal.h \
-  inttypes.h stddef.h unistd.h \
+  inttypes.h stddef.h stdlib.h unistd.h \
   sockLib.h inetLib.h net/if.h], [], [], [AC_INCLUDES_DEFAULT])
 
 AC_CHECK_HEADER([[search.h]],