diff --git a/poseidon/poseidon.go b/poseidon/poseidon.go
index c7b6d28..2df83b0 100644
--- a/poseidon/poseidon.go
+++ b/poseidon/poseidon.go
@@ -168,15 +168,16 @@ func Hash(arr []*big.Int) (*big.Int, error) {
 
 	r := constants.fqR.Zero()
 	for i := 0; i < len(arr); i = i + 5 {
-		var fiveElems [5]*big.Int
+		var toHash [6]*big.Int
 		for j := 0; j < 5; j++ {
 			if i+j < len(arr) {
-				fiveElems[j] = arr[i+j]
+				toHash[j] = arr[i+j]
 			} else {
-				fiveElems[j] = _constants.Zero
+				toHash[j] = _constants.Zero
 			}
 		}
-		ph, err := PoseidonHash(fiveElems[:])
+		toHash[5] = r
+		ph, err := PoseidonHash(toHash[:])
 		if err != nil {
 			return nil, err
 		}
diff --git a/poseidon/poseidon_test.go b/poseidon/poseidon_test.go
index 1104db5..a52e01a 100644
--- a/poseidon/poseidon_test.go
+++ b/poseidon/poseidon_test.go
@@ -43,7 +43,7 @@ func TestPoseidon(t *testing.T) {
 	}
 	hmsg, err := Hash(msgElems)
 	assert.Nil(t, err)
-	assert.Equal(t, "11821124228916291136371255062457365369197326845706357273715164664419275913793", hmsg.String())
+	assert.Equal(t, "19204466598658860237115179437116112945222240370078952939676636700594938553268", hmsg.String())
 
 	msg2 := []byte("Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum. Lorem ipsum dolor sit amet.")
 	msg2Elems := make([]*big.Int, 0, len(msg2)/n+1)
@@ -59,11 +59,11 @@ func TestPoseidon(t *testing.T) {
 	}
 	hmsg2, err := Hash(msg2Elems)
 	assert.Nil(t, err)
-	assert.Equal(t, "10747013384255785702102976082726575658403084163954725275481577373644732938016", hmsg2.String())
+	assert.Equal(t, "11846976426841208067103690249139614816718727366915557488657094868020932500524", hmsg2.String())
 
 	hmsg2, err = HashBytes(msg2)
 	assert.Nil(t, err)
-	assert.Equal(t, "10747013384255785702102976082726575658403084163954725275481577373644732938016", hmsg2.String())
+	assert.Equal(t, "11846976426841208067103690249139614816718727366915557488657094868020932500524", hmsg2.String())
 }
 
 func TestPoseidonBrokenChunks(t *testing.T) {