diff --git a/command/pr.go b/command/pr.go
index 2d4b63d61..a9cbe57ed 100644
--- a/command/pr.go
+++ b/command/pr.go
@@ -359,7 +359,10 @@ func prClose(cmd *cobra.Command, args []string) error {
 		return err
 	}
 
-	if pr.Closed {
+	if pr.State == "MERGED" {
+		fmt.Fprintf(colorableErr(cmd), "%s Can't close pull request #%d because it was already merged\n", utils.Yellow("!"), pr.Number)
+		return nil
+	} else if pr.Closed {
 		fmt.Fprintf(colorableErr(cmd), "%s Pull request #%d is already closed\n", utils.Yellow("!"), pr.Number)
 		return nil
 	}