diff --git a/error.go b/error.go
index b4f7329..9bc2ae6 100644
--- a/error.go
+++ b/error.go
@@ -12,6 +12,6 @@ type RequestError struct {
 	Message  string
 }
 
-func (re *RequestError) String() string {
+func (re *RequestError) Error() string {
 	return fmt.Sprintf("error for endpoint %s (%d): %s", re.Response.Request.URL.String(), re.Response.StatusCode, re.Message)
 }