diff --git a/app/assets/javascripts/discourse/templates/preferences-second-factor.hbs b/app/assets/javascripts/discourse/templates/preferences-second-factor.hbs
index c425d6bf7f7..dcd1368fdd6 100644
--- a/app/assets/javascripts/discourse/templates/preferences-second-factor.hbs
+++ b/app/assets/javascripts/discourse/templates/preferences-second-factor.hbs
@@ -20,7 +20,7 @@
 
       <div class="control-group">
         <div class="controls">
-          {{second-factor-input value=secondFactorToken inputId='second-factor-token'}}
+          {{second-factor-input maxlength=6 value=secondFactorToken inputId='second-factor-token'}}
         </div>
 
         <div class='instructions controls'>
@@ -72,7 +72,7 @@
           <label class="control-label input-prepend">{{i18n 'user.second_factor.label'}}</label>
 
           <div class="controls">
-            {{second-factor-input value=secondFactorToken inputId='second-factor-token'}}
+            {{second-factor-input maxlength=6 value=secondFactorToken inputId='second-factor-token'}}
           </div>
         </div>