diff --git a/partner_compassion/models/advocate_details.py b/partner_compassion/models/advocate_details.py
index 149276a2..ca45f2b5 100644
--- a/partner_compassion/models/advocate_details.py
+++ b/partner_compassion/models/advocate_details.py
@@ -129,7 +129,7 @@ def _compute_thank_you_quote(self):
                 "img_alt": details.display_name,
                 "image_data": details.partner_id.with_context(
                     bin_size=False
-                ).image512.decode("utf-8"),
+                ).image_512.decode("utf-8"),
                 "text": details.quote.strip() or "",
                 "attribution": _("Quote from %s %s") % (firstname, lastname)
                 if details.quote.strip()