diff --git a/progit/forms.py b/progit/forms.py
index 0b47962..6aef85a 100644
--- a/progit/forms.py
+++ b/progit/forms.py
@@ -60,6 +60,13 @@ class RequestPullForm(wtf.Form):
     )
 
 
+class AddIssueTagForm(wtf.Form):
+    ''' Form to add a comment to an issue. '''
+    tag = wtforms.TextField(
+        'tag', [wtforms.validators.Optional()]
+    )
+
+
 class UpdateIssueForm(wtf.Form):
     ''' Form to add a comment to an issue. '''
     tag = wtforms.TextField(