diff --git a/third-party/CMakeLists.txt b/third-party/CMakeLists.txt
index b81ad94de89..7e49a18c42c 100644
--- a/third-party/CMakeLists.txt
+++ b/third-party/CMakeLists.txt
@@ -142,6 +142,10 @@ set(FLATCC_DEBUG_CLANG_SANITIZE
     OFF
     CACHE BOOL ""
 )
+set(FLATCC_ALLOW_WERROR
+    OFF
+    CACHE BOOL ""
+)
 set(FLATCC_INSTALL
     OFF
     CACHE BOOL ""