diff --git a/forms.go b/forms.go
index 7a555c0..8c0ea07 100644
--- a/forms.go
+++ b/forms.go
@@ -48,7 +48,11 @@ func decode(form Values, rv reflect.Value, prefix string) error {
 				continue
 			}
 
-			tu.UnmarshalText([]byte(v[0]))
+			err := tu.UnmarshalText([]byte(v[0]))
+			if err != nil {
+				return err
+			}
+
 			continue
 		}