diff --git a/data/registers/usart_v2.yaml b/data/registers/usart_v2.yaml
index 7f8a06b..d546a6a 100644
--- a/data/registers/usart_v2.yaml
+++ b/data/registers/usart_v2.yaml
@@ -116,11 +116,6 @@ fieldset/CR1:
       bit_offset: 12
       bit_size: 1
       enum: M0
-    - name: M1
-      description: Word length
-      bit_offset: 12
-      bit_size: 1
-      enum: M1
     - name: MME
       description: Mute mode enable
       bit_offset: 13
@@ -153,6 +148,11 @@ fieldset/CR1:
       description: End of Block interrupt enable
       bit_offset: 27
       bit_size: 1
+    - name: M1
+      description: Word length
+      bit_offset: 28
+      bit_size: 1
+      enum: M1
 fieldset/CR2:
   description: Control register 2
   fields: