diff --git a/issue.go b/issue.go
index ab3e352..7df52e2 100644
--- a/issue.go
+++ b/issue.go
@@ -32,7 +32,7 @@ type Issue struct {
 // Attachment represents a JIRA attachment
 type Attachment struct {
 	Self      string    `json:"self,omitempty"`
-	Id        string    `json:"id,omitempty"`
+	ID        string    `json:"id,omitempty"`
 	Filename  string    `json:"filename,omitempty"`
 	Author    *Assignee `json:"author,omitempty"`
 	Created   string    `json:"created,omitempty"`
diff --git a/issue_test.go b/issue_test.go
index 382a8f0..4d1f916 100644
--- a/issue_test.go
+++ b/issue_test.go
@@ -167,7 +167,7 @@ func TestIssueDownloadAttachment(t *testing.T) {
 		t.Error("Expected attachment text", err)
 	}
 	if string(attachment) != testAttachment {
-		t.Errorf("Expecting an attachment", string(attachment))
+		t.Errorf("Expecting an attachment: %s", string(attachment))
 	}
 
 	if resp.StatusCode != 200 {