diff --git a/roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml
index d8d48e8d5..85f7df065 100644
--- a/roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-meta-instagram/defaults/main.yml
@@ -316,7 +316,7 @@ matrix_mautrix_meta_instagram_registration_yaml: |
   namespaces:
     users:
     - exclusive: true
-      regex: '^@{{ matrix_mautrix_meta_instagram_bridge_username_prefix }}.+:{{ matrix_mautrix_meta_instagram_homeserver_domain | regex_escape }}$'
+      regex: '^@{{ matrix_mautrix_meta_instagram_bridge_username_prefix | regex_escape }}.+:{{ matrix_mautrix_meta_instagram_homeserver_domain | regex_escape }}$'
     - exclusive: true
       regex: '^@{{ matrix_mautrix_meta_instagram_appservice_username | regex_escape }}:{{ matrix_mautrix_meta_instagram_homeserver_domain | regex_escape }}$'
   url: {{ matrix_mautrix_meta_instagram_appservice_address }}
diff --git a/roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml b/roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml
index d212f0241..246a15980 100644
--- a/roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml
+++ b/roles/custom/matrix-bridge-mautrix-meta-messenger/defaults/main.yml
@@ -316,7 +316,7 @@ matrix_mautrix_meta_messenger_registration_yaml: |
   namespaces:
     users:
     - exclusive: true
-      regex: '^@{{ matrix_mautrix_meta_messenger_bridge_username_prefix }}.+:{{ matrix_mautrix_meta_messenger_homeserver_domain | regex_escape }}$'
+      regex: '^@{{ matrix_mautrix_meta_messenger_bridge_username_prefix | regex_escape }}.+:{{ matrix_mautrix_meta_messenger_homeserver_domain | regex_escape }}$'
     - exclusive: true
       regex: '^@{{ matrix_mautrix_meta_messenger_appservice_username | regex_escape }}:{{ matrix_mautrix_meta_messenger_homeserver_domain | regex_escape }}$'
   url: {{ matrix_mautrix_meta_messenger_appservice_address }}