diff --git a/alembic/versions/004_camera_enum.py b/alembic/versions/004_camera_enum.py
new file mode 100644
index 0000000..7424719
--- /dev/null
+++ b/alembic/versions/004_camera_enum.py
@@ -0,0 +1,36 @@
+"""events.camera source type
+
+Revision ID: 004_camera_enum
+Revises: 003_news
+Create Date: 2026-08-25
+"""
+
+from alembic import op
+
+revision = '004_camera_enum'
+down_revision = '003_news'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # Postgres enums have no IF NOT EXISTS for values — guard manually so the
+    # migration stays idempotent across restarts.
+    op.execute("""
+        DO $$
+        BEGIN
+            IF NOT EXISTS (
+                SELECT 1 FROM pg_enum e
+                JOIN pg_typname t ON t.oid = e.enumtypid
+                WHERE t.typname = 'event_source_type' AND e.enumlabel = 'camera'
+            ) THEN
+                ALTER TYPE event_source_type ADD VALUE 'camera';
+            END IF;
+        END
+        $$;
+    """)
+
+
+def downgrade() -> None:
+    # Enum value removal is not supported by Postgres; leave it in place.
+    pass