diff --git a/configure.ac b/configure.ac
index 15179c1adc..c4e345224c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -166,7 +166,6 @@ AC_SUBST(nmdatadir, '${datadir}'/$PACKAGE, [NetworkManager shared data directory
 AC_SUBST(nmstatedir, '${localstatedir}'/lib/$PACKAGE, [NetworkManager persistent state directory])
 AC_SUBST(nmrundir, '${runstatedir}'/$PACKAGE, [NetworkManager runtime state directory])
 
-AC_GNU_SOURCE
 AC_CHECK_FUNCS([__secure_getenv secure_getenv])
 
 # Alternative configuration plugins