diff --git a/roles/custom/matrix-base/templates/static-files/well-known/matrix-client.j2 b/roles/custom/matrix-base/templates/static-files/well-known/matrix-client.j2
index e3a3172e6..45c3ea2a0 100644
--- a/roles/custom/matrix-base/templates/static-files/well-known/matrix-client.j2
+++ b/roles/custom/matrix-base/templates/static-files/well-known/matrix-client.j2
@@ -20,10 +20,10 @@
 	{% endif %}
 	{% if matrix_client_element_jitsi_preferredDomain %},
 	"io.element.jitsi": {
-		"preferred_domain": {{ matrix_client_element_jitsi_preferredDomain|to_json }}
+		"preferredDomain": {{ matrix_client_element_jitsi_preferredDomain|to_json }}
 	},
 	"im.vector.riot.jitsi": {
-		"preferred_domain": {{ matrix_client_element_jitsi_preferredDomain|to_json }}
+		"preferredDomain": {{ matrix_client_element_jitsi_preferredDomain|to_json }}
 	}
 	{% endif %}
 	{% if matrix_sliding_sync_enabled %},