diff --git a/GPy/core/parameterization/parameter_core.py b/GPy/core/parameterization/parameter_core.py
index f890a0aa..dd66d986 100644
--- a/GPy/core/parameterization/parameter_core.py
+++ b/GPy/core/parameterization/parameter_core.py
@@ -594,9 +594,10 @@ class Indexable(Nameable, Observable):
     def tie_vector(self, *plist):
         """Tie a vector of parameters to other vectors of parameters"""
         for p in plist:
-            self._highest_parent_.ties.tie_vector(self,p)
+            self._highest_parent_.ties.tie_vector(self, p)
         self._highest_parent_._trigger_params_changed()
 
+
     #===========================================================================
     # Constrain operations -> done
     #===========================================================================
diff --git a/GPy/core/parameterization/ties_and_remappings.py b/GPy/core/parameterization/ties_and_remappings.py
index 2c1a4985..15cabe67 100644
--- a/GPy/core/parameterization/ties_and_remappings.py
+++ b/GPy/core/parameterization/ties_and_remappings.py
@@ -223,7 +223,7 @@ class Tie(Parameterized):
         label2 = []
         self._traverse_param(lambda x: x.tie.flat, (p2,), label2)
         label2 = np.hstack(label2)
-        expandlist = np.where(label1*label2==0)[0]
+        expandlist = np.where(label1+label2==0)[0]
         labellist =label1.copy()
         idx = np.logical_and(label1==0,label2>0)
         labellist[idx] = label2[idx]
@@ -369,8 +369,11 @@ class Tie(Parameterized):
         self._sync_constraints(plist, toTiedParam)
         self._update_label_buf()
         self.update_model(True)
+    
+    def tie_vector(self, plist):
+        p_splits = [self._keepParamList([p]) for p in plist]
                 
-    def tie_vector(self, p1, p2):
+    def _tie_vector(self, p1, p2):
         """tie a pair of vectors"""
         self.update_model(False)        
         expandlist,removelist,labellist = self._get_labels_vector(p1, p2)
diff --git a/GPy/testing/tie_tests.py b/GPy/testing/tie_tests.py
index 782caa61..ad3ee746 100644
--- a/GPy/testing/tie_tests.py
+++ b/GPy/testing/tie_tests.py
@@ -45,6 +45,14 @@ class TieTests(unittest.TestCase):
         self.assertTrue(m.ties.checkTieVector([m.Z[:2],m.Z[2:4]]))
         self.assertTrue(m.checkgrad())
         
+    def test_tie_multi_vector(self):
+        m = GPy.examples.dimensionality_reduction.bgplvm_oil(N=100, optimize=False,plot=False)
+        m.X.mean[:1].tie_vector(m.X.mean[1:2], m.X.mean[2:3])
+        self.assertTrue(m.ties.checkValueConsistency())
+        self.assertTrue(m.ties.checkConstraintConsistency())
+        self.assertTrue(m.ties.checkTieVector([m.X.mean[:1],m.X.mean[1:2], m.X.mean[2:3]]))
+        self.assertTrue(m.checkgrad())
+        
     def test_tie_vector_merge(self):
         m = GPy.examples.regression.sparse_GP_regression_2D(optimize=False, plot=False)
         m.Z.constrain_positive(warning=False)