diff --git a/configure.ac b/configure.ac
index 05132d65..adff6f6b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,7 +4,7 @@ dnl Process this file with autoconf to produce a configure script.
 rm -f config.cache
 
 AC_INIT([terminology], [0.1.0], [enlightenment-devel@lists.sourceforge.net])
-AC_PREREQ([2.52])
+AC_PREREQ([2.60])
 AC_CONFIG_SRCDIR([configure.ac])
 AC_CONFIG_MACRO_DIR([m4])
 
@@ -13,6 +13,7 @@ AC_CONFIG_HEADERS([terminology_config.h])
 AM_INIT_AUTOMAKE([1.6 dist-bzip2])
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 
+AC_USE_SYSTEM_EXTENSIONS
 AM_PROG_CC_STDC
 AM_PROG_CC_C_O
 
diff --git a/src/bin/Makefile.am b/src/bin/Makefile.am
index 59f3e924..10012fb7 100644
--- a/src/bin/Makefile.am
+++ b/src/bin/Makefile.am
@@ -9,6 +9,7 @@ terminology_CPPFLAGS = -I. \
 terminology_LDADD = @TERMINOLOGY_LIBS@
 
 terminology_SOURCES = \
+private.h \
 col.c col.h \
 config.c config.h \
 keyin.c keyin.h \
diff --git a/src/bin/private.h b/src/bin/private.h
new file mode 100644
index 00000000..d9061302
--- /dev/null
+++ b/src/bin/private.h
@@ -0,0 +1,3 @@
+#ifdef HAVE_CONFIG_H
+#include "terminology_config.h"
+#endif
diff --git a/src/bin/termpty.c b/src/bin/termpty.c
index 943cb957..15421881 100644
--- a/src/bin/termpty.c
+++ b/src/bin/termpty.c
@@ -1,4 +1,5 @@
-#define _XOPEN_SOURCE 600
+#include "private.h"
+
 #include <Elementary.h>
 #include "termpty.h"
 #include <sys/types.h>