diff --git a/group_vars/matrix_servers b/group_vars/matrix_servers
index d222ded5e..3a72855ae 100755
--- a/group_vars/matrix_servers
+++ b/group_vars/matrix_servers
@@ -4909,6 +4909,8 @@ matrix_synapse_experimental_features_msc4108_enabled: "{{ matrix_authentication_
 
 matrix_synapse_experimental_features_msc4140_enabled: "{{ matrix_rtc_enabled }}"
 
+matrix_synapse_experimental_features_msc4143_enabled: "{{ matrix_rtc_enabled }}"
+
 matrix_synapse_experimental_features_msc4222_enabled: "{{ matrix_rtc_enabled }}"
 
 # Disable password authentication when delegating authentication to Matrix Authentication Service.