diff --git a/opentech/apply/users/forms.py b/opentech/apply/users/forms.py
index 34fc190423061f8df12379a6e7432aeb371010dd..88e7bdbc44a63114c5929a66055b805d56fc51b8 100644
--- a/opentech/apply/users/forms.py
+++ b/opentech/apply/users/forms.py
@@ -39,7 +39,7 @@ class ProfileForm(forms.ModelForm):
         if slack:
             slack = slack.strip()
             if ' ' in slack:
-                raise forms.ValidationError('Slack IDs must not include spaces')
+                raise forms.ValidationError('Slack names must not include spaces')
 
             if not slack.startswith('@'):
                 slack = '@' + slack
diff --git a/opentech/apply/users/migrations/0007_user_slack.py b/opentech/apply/users/migrations/0007_user_slack.py
index 65336119a83b839deec9e2ecf641414da146d3f8..177e18168a780bfa9cb95f21b84f57a66a49f4f7 100644
--- a/opentech/apply/users/migrations/0007_user_slack.py
+++ b/opentech/apply/users/migrations/0007_user_slack.py
@@ -13,6 +13,6 @@ class Migration(migrations.Migration):
         migrations.AddField(
             model_name='user',
             name='slack',
-            field=models.CharField(blank=True, help_text='This is the name we should "@" when sending notifications', max_length=50, verbose_name='Slack name'),
+            field=models.CharField(blank=True, help_text='This is the name we should "@mention" when sending notifications', max_length=50, verbose_name='Slack name'),
         ),
     ]
diff --git a/opentech/apply/users/models.py b/opentech/apply/users/models.py
index 1260022079cd2e82551c1c87c0f5466532822bcd..62e753ef3dc3fbf270a0873add6ebc4364477ded 100644
--- a/opentech/apply/users/models.py
+++ b/opentech/apply/users/models.py
@@ -59,7 +59,7 @@ class User(AbstractUser):
     slack = models.CharField(
         verbose_name='Slack name',
         blank=True,
-        help_text='This is the name we should "@" when sending notifications',
+        help_text='This is the name we should "@mention" when sending notifications',
         max_length=50,
     )