diff --git a/cmd/protoc-gen-go-ttrpc/generator.go b/cmd/protoc-gen-go-ttrpc/generator.go
index 6c0a54c..d3798d3 100644
--- a/cmd/protoc-gen-go-ttrpc/generator.go
+++ b/cmd/protoc-gen-go-ttrpc/generator.go
@@ -91,6 +91,11 @@ func newGenerator(out *protogen.GeneratedFile) *generator {
 }
 
 func generate(plugin *protogen.Plugin, input *protogen.File) error {
+	if len(input.Services) == 0 {
+		// Only generate a Go file if the file has some services.
+		return nil
+	}
+
 	file := plugin.NewGeneratedFile(input.GeneratedFilenamePrefix+"_ttrpc.pb.go", input.GoImportPath)
 	file.P("// Code generated by protoc-gen-go-ttrpc. DO NOT EDIT.")
 	file.P("// source: ", input.Desc.Path())