1 files changed, 1 insertions, 1 deletions

diff --git a/configure b/configure
index 10d7c1bd..1e3a2421 100755
--- a/configure
+++ b/configure
@@ -210,7 +210,7 @@ fi
 echo CFLAGS=$CFLAGS $CPPFLAGS >> Makefile.settings
 echo CFLAGS+=-I${srcdir} -I${srcdir}/lib -I${srcdir}/protocols -I. >> Makefile.settings
 
-echo CFLAGS+=-DHAVE_CONFIG_H >> Makefile.settings
+echo CFLAGS+=-DHAVE_CONFIG_H -D_GNU_SOURCE >> Makefile.settings
 
 if [ -n "$CC" ]; then
 	CC=$CC