diff --git a/lib/formats/json/parser.js b/lib/formats/json/parser.js
index cb82cc1..d72a153 100644
--- a/lib/formats/json/parser.js
+++ b/lib/formats/json/parser.js
@@ -1,7 +1,7 @@
 const {
   isString,
   isDefinedOrThrow,
-  isValidOrThrow
+  isStringOrObjectOrThrow
 } = require("../../utils/fun.js");
 
 function JSONParser() {
@@ -25,7 +25,7 @@ function validateAndParse(payload) {
   var json =
     Array.of(payload)
       .filter(p => isDefinedOrThrow(p, nullOrIndefinedPayload))
-      .filter(p => isValidOrThrow(p, invalidPayloadTypeError))
+      .filter(p => isStringOrObjectOrThrow(p, invalidPayloadTypeError))
       .map(asJSON)
       .shift();
 
diff --git a/lib/utils/fun.js b/lib/utils/fun.js
index 38dc3a2..cf0ca68 100644
--- a/lib/utils/fun.js
+++ b/lib/utils/fun.js
@@ -8,7 +8,7 @@ const isDefinedOrThrow = (v, t) =>
     ?  () => true
     : (() => {throw t})());
 
-const isValidOrThrow = (v, t) =>
+const isStringOrObjectOrThrow = (v, t) =>
         (isString(v)
           ? true
           : isObject(v)
@@ -21,5 +21,5 @@ module.exports = {
   isDefined : isDefined,
 
   isDefinedOrThrow : isDefinedOrThrow,
-  isValidOrThrow : isValidOrThrow
+  isStringOrObjectOrThrow : isStringOrObjectOrThrow
 };