diff --git a/configure.ac b/configure.ac
index 1ce9cad9..0a474f7e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -371,6 +371,7 @@ AC_CHECK_HEADERS([argz.h \
                   sys/param.h \
                   sys/socket.h \
                   sys/time.h \
+                  sys/types.h \
                   termios.h \
                   unistd.h \
 		  utime.h \