diff --git a/packages/node_modules/@node-red/runtime/lib/nodes/context/localfilesystem.js b/packages/node_modules/@node-red/runtime/lib/nodes/context/localfilesystem.js
index 0f83573e8..cf1769700 100644
--- a/packages/node_modules/@node-red/runtime/lib/nodes/context/localfilesystem.js
+++ b/packages/node_modules/@node-red/runtime/lib/nodes/context/localfilesystem.js
@@ -245,7 +245,7 @@ LocalFileSystem.prototype.get = function(scope, key, callback) {
         return this.cache.get(scope,key,callback);
     }
     if(typeof callback !== "function"){
-        throw new Error("Callback must be a function");
+        throw new Error("File Store cache disabled - only asynchronous access supported");
     }
     var storagePath = getStoragePath(this.storageBaseDir ,scope);
     loadFile(storagePath + ".json").then(function(data){
@@ -304,7 +304,7 @@ LocalFileSystem.prototype.set = function(scope, key, value, callback) {
             }, this.flushInterval);
         }
     } else if (callback && typeof callback !== 'function') {
-        throw new Error("Callback must be a function");
+        throw new Error("File Store cache disabled - only asynchronous access supported");
     } else {
         self.writePromise = self.writePromise.then(function() { return loadFile(storagePath + ".json") }).then(function(data){
             var obj = data ? JSON.parse(data) : {}