diff --git a/package/flatcc/flatcc.mk b/package/flatcc/flatcc.mk
index c27809b86a..fcace691c0 100644
--- a/package/flatcc/flatcc.mk
+++ b/package/flatcc/flatcc.mk
@@ -10,6 +10,8 @@ FLATCC_LICENSE = Apache-2.0
 FLATCC_LICENSE_FILES = LICENSE
 FLATCC_INSTALL_STAGING = YES
 FLATCC_DEPENDENCIES = host-flatcc
+FLATCC_CONF_OPTS = -DFLATCC_ALLOW_WERROR=OFF
+HOST_FLATCC_CONF_OPTS = -DFLATCC_ALLOW_WERROR=OFF
 
 # Disable build of tests and samples
 FLATCC_CONF_OPTS += -DFLATCC_TEST=OFF