diff --git a/configure.ac b/configure.ac
index c8c7b379..9ba3eb84 100644
--- a/configure.ac
+++ b/configure.ac
@@ -320,6 +320,7 @@ if test "x$enable_hardening" != "xno"; then
 fi
 
 AM_CFLAGS="$CFLAGS $COVERAGE_CFLAGS -Wall -Werror -Wreturn-type -Wsign-compare -Wno-self-assign -Wmissing-prototypes"
+AM_CFLAGS="$AM_CFLAGS -Wno-deprecated-declarations"
 AM_LDFLAGS="$LDFLAGS $COVERAGE_LDFLAGS"
 
 AC_SUBST([AM_CFLAGS])