diff --git a/msg/RegisterExtComponentReply.msg b/msg/RegisterExtComponentReply.msg
index 5003edd..0223af7 100644
--- a/msg/RegisterExtComponentReply.msg
+++ b/msg/RegisterExtComponentReply.msg
@@ -3,7 +3,7 @@ uint64 timestamp # time since system start (microseconds)
 uint64 request_id          # ID from the request
 char[25] name              # name from the request
 
-uint16 px4_sdk_api_version
+uint16 px4_ros2_api_version
 
 bool success
 int8 arming_check_id      # arming check registration ID (-1 if invalid)
diff --git a/msg/RegisterExtComponentRequest.msg b/msg/RegisterExtComponentRequest.msg
index ad35433..46ab0cb 100644
--- a/msg/RegisterExtComponentRequest.msg
+++ b/msg/RegisterExtComponentRequest.msg
@@ -4,9 +4,9 @@ uint64 timestamp # time since system start (microseconds)
 uint64 request_id                  # ID, set this to a random value
 char[25] name                      # either the requested mode name, or component name
 
-uint16 LATEST_PX4_SDK_API_VERSION = 1 # API version compatibility. Increase this on a breaking semantic change. Changes to any message field are detected separately and do not require an API version change.
+uint16 LATEST_PX4_ROS2_API_VERSION = 1 # API version compatibility. Increase this on a breaking semantic change. Changes to any message field are detected separately and do not require an API version change.
 
-uint16 px4_sdk_api_version   # Set to LATEST_PX4_SDK_API_VERSION
+uint16 px4_ros2_api_version   # Set to LATEST_PX4_ROS2_API_VERSION
 
 # Components to be registered
 bool register_arming_check