diff --git a/src/membership/admin.py b/src/membership/admin.py
index 1c02f0a..69e2c22 100644
--- a/src/membership/admin.py
+++ b/src/membership/admin.py
@@ -148,21 +148,21 @@ class MemberAdmin(UserAdmin):
 class WaitingListEntryAdmin(admin.ModelAdmin):
     """Admin for WaitingList model."""
 
-    list_display = ("email", "has_user")
-    actions = ("create_user",)
+    list_display = ("email", "member")
+    actions = ("create_member",)
 
-    @admin.action(description="Create user account for entries")
-    def create_user(self, request: HttpRequest, queryset: QuerySet[WaitingListEntry]) -> None:
+    @admin.action(description="Create member account for entries")
+    def create_member(self, request: HttpRequest, queryset: QuerySet[WaitingListEntry]) -> None:
         """Create a user account for this entry.
 
         Note that actions can soon be made available from the edit page, too:
         https://github.com/django/django/pull/16012
         """
         for entry in queryset:
-            Member.objects.create_user(email=entry.email, username=slugify(entry.email), is_active=False)
-            entry.has_user = True
+            member = Member.objects.create_user(email=entry.email, username=slugify(entry.email), is_active=False)
+            entry.member = member
             entry.save()
             messages.info(
                 request,
-                f"Added user for f{entry.email} - ensure they have a membership and send an invite email.",
+                f"Added user for {entry.email} - ensure they have a membership and send an invite email.",
             )
diff --git a/src/membership/forms.py b/src/membership/forms.py
index b91d03b..71afaaa 100644
--- a/src/membership/forms.py
+++ b/src/membership/forms.py
@@ -23,6 +23,7 @@ class InviteForm(SetPasswordForm):
         Taken from the allauth Signup form - we should consider that data can be leaked here.
         """
         value = self.cleaned_data["username"]
+        # The allauth adapter ensures the username is unique.
         return get_allauth_adapter().clean_username(value)
 
     def save(self) -> None:
diff --git a/src/membership/migrations/0010_waitinglistentry_has_user.py b/src/membership/migrations/0010_waitinglistentry_has_user.py
deleted file mode 100644
index 331dc28..0000000
--- a/src/membership/migrations/0010_waitinglistentry_has_user.py
+++ /dev/null
@@ -1,18 +0,0 @@
-# Generated by Django 5.1rc1 on 2024-08-11 21:27
-
-from django.db import migrations, models
-
-
-class Migration(migrations.Migration):
-
-    dependencies = [
-        ('membership', '0009_membership_referral_code'),
-    ]
-
-    operations = [
-        migrations.AddField(
-            model_name='waitinglistentry',
-            name='has_user',
-            field=models.BooleanField(default=False, help_text='Once a user account is generated (use the admin action), this field will be marked.', verbose_name='has user'),
-        ),
-    ]
diff --git a/src/membership/migrations/0010_waitinglistentry_member.py b/src/membership/migrations/0010_waitinglistentry_member.py
new file mode 100644
index 0000000..3bc2e08
--- /dev/null
+++ b/src/membership/migrations/0010_waitinglistentry_member.py
@@ -0,0 +1,19 @@
+# Generated by Django 5.1rc1 on 2024-08-14 08:05
+
+import django.db.models.deletion
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('membership', '0009_membership_referral_code'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='waitinglistentry',
+            name='member',
+            field=models.ForeignKey(help_text='Once a member account is generated (use the admin action), this field will be marked.', null=True, blank=True, on_delete=django.db.models.deletion.CASCADE, to='membership.member', verbose_name='has member'),
+        ),
+    ]
diff --git a/src/membership/models.py b/src/membership/models.py
index b581b51..f9e5ddd 100644
--- a/src/membership/models.py
+++ b/src/membership/models.py
@@ -230,10 +230,13 @@ class WaitingListEntry(CreatedModifiedAbstract):
     email = models.EmailField()
     geography = models.CharField(verbose_name=_("geography"), blank=True, default="")
     comment = models.TextField(blank=True)
-    has_user = models.BooleanField(
-        default=False,
-        verbose_name=_("has user"),
-        help_text=_("Once a user account is generated (use the admin action), this field will be marked."),
+    member = models.ForeignKey(
+        Member,
+        null=True,
+        blank=True,
+        verbose_name=_("has member"),
+        help_text=_("Once a member account is generated (use the admin action), this field will be marked."),
+        on_delete=models.CASCADE,
     )
 
     def __str__(self) -> str: