diff --git a/api/envoy/config/trace/v2/zipkin.proto b/api/envoy/config/trace/v2/zipkin.proto
index a825d85bb7f9..2289e55bfe68 100644
--- a/api/envoy/config/trace/v2/zipkin.proto
+++ b/api/envoy/config/trace/v2/zipkin.proto
@@ -17,7 +17,7 @@ option (udpa.annotations.file_status).package_version_status = FROZEN;
 
 // Configuration for the Zipkin tracer.
 // [#extension: envoy.tracers.zipkin]
-// [#next-free-field: 6]
+// [#next-free-field: 7]
 message ZipkinConfig {
   // Available Zipkin collector endpoint versions.
   enum CollectorEndpointVersion {
@@ -61,4 +61,8 @@ message ZipkinConfig {
   // Determines the selected collector endpoint version. By default, the ``HTTP_JSON_V1`` will be
   // used.
   CollectorEndpointVersion collector_endpoint_version = 5;
+
+  // Optional hostname to use when sending spans to the collector_cluster. Useful for collectors
+  // that require a specific hostname. Defaults to `collector_cluster` above.
+  string collector_hostname = 6;
 }
diff --git a/generated_api_shadow/envoy/config/trace/v2/zipkin.proto b/generated_api_shadow/envoy/config/trace/v2/zipkin.proto
index a825d85bb7f9..2289e55bfe68 100644
--- a/generated_api_shadow/envoy/config/trace/v2/zipkin.proto
+++ b/generated_api_shadow/envoy/config/trace/v2/zipkin.proto
@@ -17,7 +17,7 @@ option (udpa.annotations.file_status).package_version_status = FROZEN;
 
 // Configuration for the Zipkin tracer.
 // [#extension: envoy.tracers.zipkin]
-// [#next-free-field: 6]
+// [#next-free-field: 7]
 message ZipkinConfig {
   // Available Zipkin collector endpoint versions.
   enum CollectorEndpointVersion {
@@ -61,4 +61,8 @@ message ZipkinConfig {
   // Determines the selected collector endpoint version. By default, the ``HTTP_JSON_V1`` will be
   // used.
   CollectorEndpointVersion collector_endpoint_version = 5;
+
+  // Optional hostname to use when sending spans to the collector_cluster. Useful for collectors
+  // that require a specific hostname. Defaults to `collector_cluster` above.
+  string collector_hostname = 6;
 }