diff --git a/readme.md b/readme.md
index b3f4128..b899f71 100644
--- a/readme.md
+++ b/readme.md
@@ -41,7 +41,7 @@ _Note_: WireViz is not designed to represent the complete wiring of a system. It
 
     cables:
       W1:
-        mm2: 0.25
+        gauge: 0.25 mm2
         length: 0.2
         color_code: DIN
         wirecount: 3