diff --git a/configure.ac b/configure.ac
index c2ac2f3..8766828 100644
--- a/configure.ac
+++ b/configure.ac
@@ -50,7 +50,7 @@ AC_SEARCH_LIBS([compress], [z], , [AC_MSG_ERROR([Unable to find zlib.])])
 AX_BOOST_BASE(, , [AC_MSG_ERROR([Unable to find boost libraries.])])
 
 # Checks for header files.
-AC_CHECK_HEADERS([arpa/inet.h fcntl.h langinfo.h limits.h locale.h netinet/in.h stddef.h stdint.h stdlib.h string.h sys/ioctl.h sys/socket.h sys/time.h termios.h unistd.h wchar.h wctype.h])
+AC_CHECK_HEADERS([arpa/inet.h fcntl.h langinfo.h limits.h locale.h netinet/in.h pty.h stddef.h stdint.h stdlib.h string.h sys/ioctl.h sys/socket.h sys/time.h termios.h unistd.h util.h wchar.h wctype.h])
 
 # Checks for typedefs, structures, and compiler characteristics.
 AC_HEADER_STDBOOL
diff --git a/src/examples/parse.cc b/src/examples/parse.cc
index 3a55258..c98f392 100644
--- a/src/examples/parse.cc
+++ b/src/examples/parse.cc
@@ -16,7 +16,8 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include <pty.h>
+#include "config.h"
+
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -32,6 +33,12 @@
 #include <iostream>
 #include <typeinfo>
 
+#if HAVE_PTY_H
+#include <pty.h>
+#elif HAVE_UTIL_H
+#include <util.h>
+#endif
+
 #include "parser.h"
 #include "swrite.h"
 
diff --git a/src/examples/termemu.cc b/src/examples/termemu.cc
index b9f0526..2a9a3c4 100644
--- a/src/examples/termemu.cc
+++ b/src/examples/termemu.cc
@@ -16,7 +16,8 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#include <pty.h>
+#include "config.h"
+
 #include <unistd.h>
 #include <stdio.h>
 #include <stdlib.h>
@@ -39,6 +40,12 @@
 #include <pwd.h>
 #include <sys/time.h>
 
+#if HAVE_PTY_H
+#include <pty.h>
+#elif HAVE_UTIL_H
+#include <util.h>
+#endif
+
 #include "parser.h"
 #include "completeterminal.h"
 #include "swrite.h"
diff --git a/src/frontend/stmclient.cc b/src/frontend/stmclient.cc
index 09f0e98..fc02ffd 100644
--- a/src/frontend/stmclient.cc
+++ b/src/frontend/stmclient.cc
@@ -16,12 +16,13 @@
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
 
+#include "config.h"
+
 #include <locale.h>
 #include <string.h>
 #include <langinfo.h>
 #include <unistd.h>
 #include <stdio.h>
-#include <pty.h>
 #include <stdlib.h>
 #include <poll.h>
 #include <sys/ioctl.h>
@@ -31,6 +32,12 @@
 #include <sys/signalfd.h>
 #include <time.h>
 
+#if HAVE_PTY_H
+#include <pty.h>
+#elif HAVE_UTIL_H
+#include <util.h>
+#endif
+
 #include "stmclient.h"
 #include "swrite.h"
 #include "completeterminal.h"