--- finch/libgnt/Makefile.am.orig	2014-11-23 08:41:25.000000000 -0800
+++ finch/libgnt/Makefile.am	2015-08-27 13:32:37.000000000 -0700
@@ -93,6 +93,7 @@
 
 AM_CPPFLAGS = \
 	$(GLIB_CFLAGS) \
+	-D_XOPEN_SOURCE_EXTENDED \
 	$(GNT_CFLAGS) \
 	$(DEBUG_CFLAGS) \
 	$(LIBXML_CFLAGS) \