diff --git a/vars/build.vars b/vars/build.vars
index c100e5b..9c781f6 100644
--- a/vars/build.vars
+++ b/vars/build.vars
@@ -275,6 +275,7 @@ RUNTIME_PREFIX="${PREFIX_NATIVE}";
 : ${PKG_PTYCON_CFLAGS_CONFIGURE_EXTRA:=-O0};
 : ${PKG_PTYCON_INSTALL_TARGET_EXTRA:="install-app install-lib"};
 : ${PKG_PTYCON_SUBDIR:=ptycon};
+: ${PKG_U16PORTS_CFLAGS_CONFIGURE_EXTRA:=-Wno-error=missing-field-initializers};
 : ${PKG_U16PORTS_URLS_GIT:=u16ports=${GITROOT_HEAD}/u16ports};
 : ${PKG_U16PORTS_INSTALL_TARGET_EXTRA:=install-lib};
 : ${PKG_U16PORTS_SUBDIR:=u16ports};