diff --git a/.changeset/thick-lamps-tease.md b/.changeset/thick-lamps-tease.md
new file mode 100644
index 000000000..23e788b77
--- /dev/null
+++ b/.changeset/thick-lamps-tease.md
@@ -0,0 +1,5 @@
+---
+"github.com/livekit/protocol": patch
+---
+
+Use consistent json field name for room configuration grant
diff --git a/auth/grants.go b/auth/grants.go
index 6a8a43308..b7fb58a05 100644
--- a/auth/grants.go
+++ b/auth/grants.go
@@ -34,7 +34,7 @@ type VideoGrant struct {
 	RoomJoin  bool   `json:"roomJoin,omitempty"`
 	Room      string `json:"room,omitempty"`
 	// Name of the room configuration to apply to the room if created
-	RoomConfiguration string `json:"room_configuration,omitempty"`
+	RoomConfiguration string `json:"roomConfiguration,omitempty"`
 
 	// permissions within a room, if none of the permissions are set explicitly
 	// it will be granted with all publish and subscribe permissions