diff --git a/accounts/abi/pack.go b/accounts/abi/pack.go
index a4c73922d4f..d1f28b5d6a8 100644
--- a/accounts/abi/pack.go
+++ b/accounts/abi/pack.go
@@ -51,29 +51,37 @@ func packElement(t Type, reflectValue reflect.Value) ([]byte, error) {
 	case StringTy:
 		return packBytesSlice([]byte(reflectValue.String()), reflectValue.Len()), nil
 	case AddressTy:
+		var slices []byte
 		if reflectValue.Kind() == reflect.Array {
-			reflectValue = mustArrayToByteSlice(reflectValue)
+			slices = mustArrayToByteSlice(reflectValue)
+		} else {
+			slices = reflectValue.Bytes()
 		}
-
-		return common.LeftPadBytes(reflectValue.Bytes(), 32), nil
+		return common.LeftPadBytes(slices, 32), nil
 	case BoolTy:
 		if reflectValue.Bool() {
 			return math.PaddedBigBytes(common.Big1, 32), nil
 		}
 		return math.PaddedBigBytes(common.Big0, 32), nil
 	case BytesTy:
+		var slices []byte
 		if reflectValue.Kind() == reflect.Array {
-			reflectValue = mustArrayToByteSlice(reflectValue)
-		}
-		if reflectValue.Type() != reflect.TypeOf([]byte{}) {
-			return []byte{}, errors.New("bytes type is neither slice nor array")
+			slices = mustArrayToByteSlice(reflectValue)
+		} else {
+			if reflectValue.Type() != reflect.TypeOf([]byte{}) {
+				return []byte{}, errors.New("bytes type is neither slice nor array")
+			}
+			slices = reflectValue.Bytes()
 		}
-		return packBytesSlice(reflectValue.Bytes(), reflectValue.Len()), nil
+		return packBytesSlice(slices, len(slices)), nil
 	case FixedBytesTy, FunctionTy:
+		var slices []byte
 		if reflectValue.Kind() == reflect.Array {
-			reflectValue = mustArrayToByteSlice(reflectValue)
+			slices = mustArrayToByteSlice(reflectValue)
+		} else {
+			slices = reflectValue.Bytes()
 		}
-		return common.RightPadBytes(reflectValue.Bytes(), 32), nil
+		return common.RightPadBytes(slices, 32), nil
 	default:
 		return []byte{}, fmt.Errorf("could not pack element, unknown type: %v", t.T)
 	}
diff --git a/accounts/abi/reflect.go b/accounts/abi/reflect.go
index f6696ea9783..a3389436098 100644
--- a/accounts/abi/reflect.go
+++ b/accounts/abi/reflect.go
@@ -89,10 +89,11 @@ func reflectIntType(unsigned bool, size int) reflect.Type {
 
 // mustArrayToByteSlice creates a new byte slice with the exact same size as value
 // and copies the bytes in value to the new slice.
-func mustArrayToByteSlice(value reflect.Value) reflect.Value {
-	slice := reflect.ValueOf(make([]byte, value.Len()))
-	reflect.Copy(slice, value)
-	return slice
+func mustArrayToByteSlice(value reflect.Value) []byte {
+	ptr := reflect.New(value.Type())
+	ptr.Elem().Set(value)
+	ret := ptr.Elem().Bytes()
+	return ret
 }
 
 // set attempts to assign src to dst by either setting, copying or otherwise.