diff --git a/completion.go b/completion.go
index 21d4897c4..02ce7b016 100644
--- a/completion.go
+++ b/completion.go
@@ -242,7 +242,7 @@ type CompletionResponse struct {
 	Created int64              `json:"created"`
 	Model   string             `json:"model"`
 	Choices []CompletionChoice `json:"choices"`
-	Usage   Usage              `json:"usage"`
+	Usage   *Usage             `json:"usage,omitempty"`
 
 	httpHeader
 }
diff --git a/completion_test.go b/completion_test.go
index 27e2d150e..f0ead0d63 100644
--- a/completion_test.go
+++ b/completion_test.go
@@ -192,7 +192,7 @@ func handleCompletionEndpoint(w http.ResponseWriter, r *http.Request) {
 	}
 	inputTokens *= n
 	completionTokens := completionReq.MaxTokens * len(prompts) * n
-	res.Usage = openai.Usage{
+	res.Usage = &openai.Usage{
 		PromptTokens:     inputTokens,
 		CompletionTokens: completionTokens,
 		TotalTokens:      inputTokens + completionTokens,