diff --git a/docs/doc.md b/docs/doc.md
index 0dd86684..f77e056d 100644
--- a/docs/doc.md
+++ b/docs/doc.md
@@ -1071,6 +1071,7 @@ func main() {
 
     if err := c.ShouldBindHeader(&h); err != nil {
       c.JSON(http.StatusOK, err)
+      return
     }
 
     fmt.Printf("%#v\n", h)