diff --git a/package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk b/package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk
index a453f75a28..3836d3c84e 100644
--- a/package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk
+++ b/package/rauc-hawkbit-updater/rauc-hawkbit-updater.mk
@@ -10,5 +10,6 @@ RAUC_HAWKBIT_UPDATER_SOURCE = rauc-hawkbit-updater-$(RAUC_HAWKBIT_UPDATER_VERSIO
 RAUC_HAWKBIT_UPDATER_LICENSE = LGPL-2.1
 RAUC_HAWKBIT_UPDATER_LICENSE_FILES = LICENSE
 RAUC_HAWKBIT_UPDATER_DEPENDENCIES = json-glib libcurl
+RAUC_HAWKBIT_UPDATER_CFLAGS = $(TARGET_CFLAGS) -std=c99
 
 $(eval $(meson-package))