diff --git a/lib/dao.js b/lib/dao.js
index 87497476..38aeb5c1 100644
--- a/lib/dao.js
+++ b/lib/dao.js
@@ -2669,6 +2669,19 @@ DataAccessObject.updateAll = function(where, data, options, cb) {
   this.applyScope(query);
   this.applyProperties(data);
 
+  var doValidate = false;
+  if (options.validate === undefined) {
+    if (Model.settings.validateUpdate === undefined) {
+      if (Model.settings.automaticValidation !== undefined) {
+        doValidate = Model.settings.automaticValidation;
+      }
+    } else {
+      doValidate = Model.settings.validateUpdate;
+    }
+  } else {
+    doValidate = options.validate;
+  }
+
   where = query.where;
 
   var context = {
@@ -2696,14 +2709,17 @@ DataAccessObject.updateAll = function(where, data, options, cb) {
           inst = new Model(data, {applyDefaultValues: false});
         }
 
-        // validation required
-        inst.isValid(function(valid) {
-          if (valid) {
+        if (doValidate === false) {
+          doUpdate(ctx.where, ctx.data);
+        } else {
+          // validation required
+          inst.isValid(function(valid) {
+            if (!valid) {
+              return cb(new ValidationError(inst));
+            }
             doUpdate(ctx.where, ctx.data);
-          } else {
-            cb(new ValidationError(inst));
-          }
-        }, options);
+          }, options);
+        }
       });
   });
 
diff --git a/test/manipulation.test.js b/test/manipulation.test.js
index 3bef0926..b6673115 100644
--- a/test/manipulation.test.js
+++ b/test/manipulation.test.js
@@ -2259,8 +2259,6 @@ describe('manipulation', function() {
     });
 
     it('should not coerce invalid values provided in where conditions', function(done) {
-      // remove the validations since update/updateAll validates the model
-      delete Person.validations;
       Person.update({name: 'Brett Boe'}, {dob: 'notadate'}, function(err) {
         should.exist(err);
         err.message.should.equal('Invalid date: notadate');
diff --git a/test/validations.test.js b/test/validations.test.js
index c3a2ee8c..773bf66a 100644
--- a/test/validations.test.js
+++ b/test/validations.test.js
@@ -51,6 +51,8 @@ describe('validations', function() {
       id: {type: Number, id: true, generated: false},
       name: {type: String},
       age: {type: Number},
+    }, {
+      validateUpdate: true,
     });
     Entry.validatesUniquenessOf('id');
     db.automigrate(function(err) {