diff --git a/backend/dev_homeserver-othersite.yaml b/backend/dev_homeserver-othersite.yaml
index 947e33cde..81e775cab 100644
--- a/backend/dev_homeserver-othersite.yaml
+++ b/backend/dev_homeserver-othersite.yaml
@@ -38,6 +38,8 @@ experimental_features:
   # MSC4222 needed for syncv2 state_after. This allow clients to
   # correctly track the state of the room.
   msc4222_enabled: true
+  # sticky events for MatrixRTC user state
+  msc4354_enabled: true
 
 # The maximum allowed duration by which sent events can be delayed, as
 # per MSC4140. Must be a positive value if set.  Defaults to no
diff --git a/backend/dev_homeserver.yaml b/backend/dev_homeserver.yaml
index fe89d95a4..dc7b42c84 100644
--- a/backend/dev_homeserver.yaml
+++ b/backend/dev_homeserver.yaml
@@ -38,7 +38,7 @@ experimental_features:
   # MSC4222 needed for syncv2 state_after. This allow clients to
   # correctly track the state of the room.
   msc4222_enabled: true
-  # sticky events for matrixRTC user state
+  # sticky events for MatrixRTC user state
   msc4354_enabled: true
 
 # The maximum allowed duration by which sent events can be delayed, as
diff --git a/backend/playwright_homeserver-othersite.yaml b/backend/playwright_homeserver-othersite.yaml
index 5cb0dd65d..35640ae9a 100644
--- a/backend/playwright_homeserver-othersite.yaml
+++ b/backend/playwright_homeserver-othersite.yaml
@@ -38,6 +38,8 @@ experimental_features:
   # MSC4222 needed for syncv2 state_after. This allow clients to
   # correctly track the state of the room.
   msc4222_enabled: true
+  # sticky events for MatrixRTC user state
+  msc4354_enabled: true
 
 # The maximum allowed duration by which sent events can be delayed, as
 # per MSC4140. Must be a positive value if set.  Defaults to no
diff --git a/backend/playwright_homeserver.yaml b/backend/playwright_homeserver.yaml
index 0d7b175c2..a83247cd9 100644
--- a/backend/playwright_homeserver.yaml
+++ b/backend/playwright_homeserver.yaml
@@ -38,6 +38,8 @@ experimental_features:
   # MSC4222 needed for syncv2 state_after. This allow clients to
   # correctly track the state of the room.
   msc4222_enabled: true
+  # sticky events for MatrixRTC user state
+  msc4354_enabled: true
 
 # The maximum allowed duration by which sent events can be delayed, as
 # per MSC4140. Must be a positive value if set.  Defaults to no