diff --git a/flask_bootstrap/templates/bootstrap/form.html b/flask_bootstrap/templates/bootstrap/form.html
index 61814b5..d0c1a6d 100644
--- a/flask_bootstrap/templates/bootstrap/form.html
+++ b/flask_bootstrap/templates/bootstrap/form.html
@@ -215,7 +215,7 @@
     {%- set _enctype = [] %}
     {%- if enctype is none -%}
         {%- for field in form %}
-            {%- if field.type == 'FileField' %}
+            {%- if field.type in ['FileField', 'MultipleFileField'] %}
                 {#- for loops come with a fairly watertight scope, so this list-hack is
           used to be able to set values outside of it #}
                 {%- set _ = _enctype.append('multipart/form-data') -%}