diff --git a/Makefile.am b/Makefile.am
index 560f40a362..c128368ce8 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -27,6 +27,7 @@ EXTRA_DIST = \
 DISTCHECK_CONFIGURE_FLAGS = \
 	--with-tests=yes \
 	--with-docs=yes \
+	--enable-more-warnings=yes \
 	--with-udev-dir=$$dc_install_base/lib/udev \
 	--with-systemdsystemunitdir=$$dc_install_base/$(systemdsystemunitdir)