diff --git a/ARCHITECTURE.md b/ARCHITECTURE.md
index 3452e5e5a..0366a64c8 100644
--- a/ARCHITECTURE.md
+++ b/ARCHITECTURE.md
@@ -66,7 +66,7 @@ async fn hello_activity(name: &str) -> String {
 
 We define the interface between the core and lang SDKs in terms of gRPC service definitions. The actual implementations of this "service" are not generated by gRPC generators, but the messages themselves are, and make it easier to hit the ground running in new languages.
 
-See the latest API definition [here](https://github.com/temporalio/sdk-core/tree/master/protos/local/temporal/sdk/core)
+See the latest API definition [here](https://github.com/temporalio/sdk-core/tree/master/sdk-core-protos/protos/local/temporal/sdk/core)
 
 
 ## Other topics