diff --git a/docs/widgets/services/customapi.md b/docs/widgets/services/customapi.md
index bd43a93d6..c392d942c 100644
--- a/docs/widgets/services/customapi.md
+++ b/docs/widgets/services/customapi.md
@@ -108,9 +108,6 @@ mappings:
       locations:
         1: name # Citadel of Ricks
     label: Location
-  - field: locations
-    label: Location count
-    format: size # 2
 ```
 
 ## Data Transformation
diff --git a/src/widgets/customapi/component.jsx b/src/widgets/customapi/component.jsx
index 52a27be94..dcd238a51 100644
--- a/src/widgets/customapi/component.jsx
+++ b/src/widgets/customapi/component.jsx
@@ -101,8 +101,7 @@ function formatValue(t, mapping, rawValue) {
       });
       break;
     case "size":
-      value = getLength(value);
-      value = t("common.number", { value });
+      value = t("common.number", { value: getLength(value) });
       break;
     case "text":
     default: