diff --git a/lib/Instance.js b/lib/Instance.js
index bde4899..2a7b2bf 100644
--- a/lib/Instance.js
+++ b/lib/Instance.js
@@ -126,6 +126,9 @@ Instance.prototype.save = function(conditions, changes, callback) {
 	}
 
 	if(!changes) {
+		var validation = validate(schema, this.__state.modified, undefined, this.__state.model.extraValidators);
+		if(!validation.passed) return callback(validation.toError());
+
 		var original = _.cloneDeep(this.__state.original);
 		var modified = _.cloneDeep(this.__state.modified);
 
@@ -232,9 +235,7 @@ Instance.prototype.__extendSchema = function() {
 					},
 					set: function(value) {
 						/// <value type="Object">Set the value of this field. Changes may be committed by calling save() on this instance.</value>
-						var validation = validate(schema[targetProperty], value, targetProperty, this.__state.model.extraValidators);
-						if (!validation.passed) throw validation.toError();
-							$.__state.modified[targetProperty] = value;
+						$.__state.modified[targetProperty] = value;
 					},
 					enumerable: true
 				});
@@ -269,8 +270,6 @@ Instance.forModel = function(model) {
 				return this.__state.modified[name] === undefined ? null : this.__state.modified[name];
 			},
 			set: function(value) {
-				var validation = validate(validator, value, name, model.extraValidators);
-				if(!validation.passed) throw validation.toError();
 				this.__state.modified[name] = value;
 			},
 			enumerable: true