diff --git a/aws/rust-runtime/aws-config/external-types.toml b/aws/rust-runtime/aws-config/external-types.toml
index 94b43e4d03a..bc926c14d05 100644
--- a/aws/rust-runtime/aws-config/external-types.toml
+++ b/aws/rust-runtime/aws-config/external-types.toml
@@ -14,8 +14,9 @@ allowed_external_types = [
    "aws_smithy_types::retry",
    "aws_smithy_types::retry::*",
    "aws_smithy_types::timeout",
-   "aws_smithy_types::timeout::config::TimeoutConfig",
-   "aws_smithy_types::timeout::error::ConfigError",
+   "aws_smithy_types::timeout::OperationTimeoutConfig",
+   "aws_smithy_types::timeout::TimeoutConfig",
+   "aws_smithy_types::timeout::TimeoutConfigBuilder",
    "aws_types::*",
    "http::response::Response",
    "http::uri::Uri",
diff --git a/aws/rust-runtime/aws-types/external-types.toml b/aws/rust-runtime/aws-types/external-types.toml
index 273584842e0..051e0986ec5 100644
--- a/aws/rust-runtime/aws-types/external-types.toml
+++ b/aws/rust-runtime/aws-types/external-types.toml
@@ -5,6 +5,6 @@ allowed_external_types = [
     "aws_smithy_http::endpoint::Endpoint",
     "aws_smithy_http::endpoint::EndpointPrefix",
     "aws_smithy_types::retry::RetryConfig",
-    "aws_smithy_types::timeout::config::TimeoutConfig",
+    "aws_smithy_types::timeout::TimeoutConfig",
     "http::uri::Uri",
 ]