--- gypsy-0.9/configure.ac.gcc7	2017-10-02 23:40:24.118530168 +0200
+++ gypsy-0.9/configure.ac	2017-10-02 23:48:34.002128724 +0200
@@ -58,7 +58,7 @@
 AS_AC_EXPAND(LIBEXECDIR, $libexecdir)
 AS_AC_EXPAND(DAEMON_USER, $with_user)
 
-CFLAGS="$CFLAGS -g -Wall -Wno-format"
+CFLAGS="$CFLAGS -g -Wall"
 
 GTK_DOC_CHECK([1.6])
 # TODO: add --with-xsltproc argument to override PATH