diff --git a/message_definitions/v1.0/development.xml b/message_definitions/v1.0/development.xml
index 7339e84a..3e4c4124 100644
--- a/message_definitions/v1.0/development.xml
+++ b/message_definitions/v1.0/development.xml
@@ -670,7 +670,7 @@
 
         The message `index` field is incremented to indicate which set of ESCs are described.
         The data for each ESC is in the same index for each of the array fields.
-        The ESC number `(message index * 4) + array index` is mapped to the a particular motor using an autopilot specific mechanism.
+        The ESC number `(message index * 4) + array index` is mapped to a particular motor using an autopilot specific mechanism.
 
         ESC_STATUS_V2 with the same message index contains contains corresponding higher-rate ESC data.</description>
       <field type="uint8_t" name="index" instance="true" minValue="0" increment="1" maxValue="25">Message index. ESC data corresponds to ESC_STATUS_V2 message with same index.</field>