diff --git a/configure.ac b/configure.ac
index 055833a7f..3e49213cc 100644
--- a/configure.ac
+++ b/configure.ac
@@ -44,6 +44,7 @@ AC_TYPE_LONG_LONG_INT
 
 AC_SEARCH_LIBS([ioperm], [ioperm])
 AC_SEARCH_LIBS([dlopen], [dl])
+AC_SEARCH_LIBS([openpty], [util])
 
 AC_CHECK_HEADERS([sys/socket.h])
 AC_CHECK_HEADERS([elf.h])