diff --git a/gn/flutter_defines.gni b/gn/flutter_defines.gni
index d817f3c510..7875f4c687 100644
--- a/gn/flutter_defines.gni
+++ b/gn/flutter_defines.gni
@@ -5,4 +5,5 @@
 flutter_defines = [
   "SK_DISABLE_EXPLICIT_GPU_RESOURCE_ALLOCATION",
   "SK_DISABLE_RENDER_TARGET_SORTING",
+  "SK_SUPPORT_LEGACY_VULKAN_INTERFACE",
 ]