1 files changed, 1 insertions, 1 deletions

diff --git a/src/util/Makefile.am b/src/util/Makefile.am
index 0c48f10e..d5783612 100644
--- a/src/util/Makefile.am
+++ b/src/util/Makefile.am
@@ -2,7 +2,7 @@ bin_PROGRAMS = vercmp testpkg
 
 INCLUDES = -I$(top_srcdir)/lib/libalpm
 
-AM_CFLAGS = -pedantic
+AM_CFLAGS = -pedantic -D_GNU_SOURCE
 
 vercmp_SOURCES = vercmp.c
 vercmp_LDADD = $(top_builddir)/lib/libalpm/.libs/libalpm.la