diff --git a/app/main/views/sign_in.py b/app/main/views/sign_in.py
index 3684737a1..49ea321f3 100644
--- a/app/main/views/sign_in.py
+++ b/app/main/views/sign_in.py
@@ -35,7 +35,7 @@ def sign_in():
         if user and session.get('invited_user'):
             invited_user = InvitedUser.from_session()
             if user.email_address.lower() != invited_user.email_address.lower():
-                flash("You can't accept an invite for another person.")
+                flash("You cannot accept an invite for another person.")
                 session.pop('invited_user', None)
                 abort(403)
             else: