diff --git a/src/coord/axisCommonTypes.ts b/src/coord/axisCommonTypes.ts
index aa92868e3e..fbfaf9cf43 100644
--- a/src/coord/axisCommonTypes.ts
+++ b/src/coord/axisCommonTypes.ts
@@ -151,7 +151,7 @@ export interface ValueAxisBaseOption extends NumericAxisBaseOptionCommon {
     /**
      * Optional value can be:
      * + `false`: always include value 0.
-     * + `false`: always include value 0.
+     * + `true`: the axis may not contain zero position.
      */
      scale?: boolean;
 }