diff --git a/protoc-gen-grpc-gateway/internal/gengateway/template.go b/protoc-gen-grpc-gateway/internal/gengateway/template.go
index 4873415c552..060075edd35 100644
--- a/protoc-gen-grpc-gateway/internal/gengateway/template.go
+++ b/protoc-gen-grpc-gateway/internal/gengateway/template.go
@@ -472,7 +472,7 @@ var (
 	_ = template.Must(localHandlerTemplate.New("local-request-func-signature").Parse(strings.Replace(`
 {{if .Method.GetServerStreaming}}
 {{else}}
-func local_request_{{.Method.Service.GetName}}_{{.Method.GetName}}_{{.Index}}(ctx context.Context, marshaler runtime.Marshaler, server {{.Method.Service.GetName}}Server, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error)
+func local_request_{{.Method.Service.GetName}}_{{.Method.GetName}}_{{.Index}}(ctx context.Context, marshaler runtime.Marshaler, server {{.Method.Service.GetName}}Service, req *http.Request, pathParams map[string]string) (proto.Message, runtime.ServerMetadata, error)
 {{end}}`, "\n", "", -1)))
 
 	_ = template.Must(localHandlerTemplate.New("local-client-rpc-request-func").Parse(`
@@ -566,7 +566,7 @@ func local_request_{{.Method.Service.GetName}}_{{.Method.GetName}}_{{.Index}}(ct
 // UnaryRPC     :call {{$svc.GetName}}Server directly.
 // StreamingRPC :currently unsupported pending https://github.com/grpc/grpc-go/issues/906.
 // Note that using this registration option will cause many gRPC library features to stop working. Consider using Register{{$svc.GetName}}{{$.RegisterFuncSuffix}}FromEndpoint instead.
-func Register{{$svc.GetName}}{{$.RegisterFuncSuffix}}Server(ctx context.Context, mux *runtime.ServeMux, server {{$svc.GetName}}Server) error {
+func Register{{$svc.GetName}}{{$.RegisterFuncSuffix}}Server(ctx context.Context, mux *runtime.ServeMux, server {{$svc.GetName}}Service) error {
 	{{range $m := $svc.Methods}}
 	{{range $b := $m.Bindings}}
 	{{if or $m.GetClientStreaming $m.GetServerStreaming}}