diff --git a/audit/audit.go b/audit/audit.go
index 3054846c2b..6043613879 100644
--- a/audit/audit.go
+++ b/audit/audit.go
@@ -8,11 +8,15 @@ import "github.com/hashicorp/vault/logical"
 // or other external services.
 type Backend interface {
 	// LogRequest is used to syncronously log a request. This is done after the
-	// request is authorized but before the request is executed.
+	// request is authorized but before the request is executed. The arguments
+	// MUST not be modified in anyway. They should be deep copied if this is
+	// a possibility.
 	LogRequest(*logical.Auth, *logical.Request) error
 
 	// LogResponse is used to syncronously log a response. This is done after
-	// the request is processed but before the response is sent.
+	// the request is processed but before the response is sent. The arguments
+	// MUST not be modified in anyway. They should be deep copied if this is
+	// a possibility.
 	LogResponse(*logical.Auth, *logical.Request, *logical.Response, error) error
 }