diff --git a/rows_go18.go b/rows_go18.go
index 85cf232..6c71eb9 100644
--- a/rows_go18.go
+++ b/rows_go18.go
@@ -53,12 +53,12 @@ func (rs *rowSetsWithDefinition) ColumnTypeScanType(index int) reflect.Type {
 	return rs.getDefinition(index).ScanType()
 }
 
-// return definition of current set metadata
+// return column definition from current set metadata
 func (rs *rowSetsWithDefinition) getDefinition(index int) *Column {
 	return rs.sets[rs.pos].def[index]
 }
 
-// NewRowsWithColumnDefinition see PR-152
+// NewRowsWithColumnDefinition return rows with columns metadata
 func NewRowsWithColumnDefinition(columns ...*Column) *Rows {
 	cols := make([]string, len(columns))
 	for i, column := range columns {
diff --git a/sqlmock.go b/sqlmock.go
index 821a4a1..d074266 100644
--- a/sqlmock.go
+++ b/sqlmock.go
@@ -20,7 +20,7 @@ import (
 // Sqlmock interface serves to create expectations
 // for any kind of database action in order to mock
 // and test real database behavior.
-type Sqlmock interface {
+type SqlmockCommon interface {
 	// ExpectClose queues an expectation for this database
 	// action to be triggered. the *ExpectedClose allows
 	// to mock database response
@@ -84,13 +84,6 @@ type Sqlmock interface {
 	// sql driver.Value slice or from the CSV string and
 	// to be used as sql driver.Rows.
 	NewRows(columns []string) *Rows
-
-	// NewRowsWithColumnDefinition allows Rows to be created from a
-	// sql driver.Value slice with a definition of sql metadata
-	NewRowsWithColumnDefinition(columns ...*Column) *Rows
-
-	// New Column allows to create a Column
-	NewColumn(name string) *Column
 }
 
 type sqlmock struct {
@@ -444,17 +437,3 @@ func (c *sqlmock) NewRows(columns []string) *Rows {
 	r.converter = c.converter
 	return r
 }
-
-// NewRowsWithColumnDefinition allows Rows to be created from a
-// sql driver.Value slice with a definition of sql metadata
-func (c *sqlmock) NewRowsWithColumnDefinition(columns ...*Column) *Rows {
-	r := NewRowsWithColumnDefinition(columns...)
-	r.converter = c.converter
-	return r
-}
-
-// NewColumn allows to create a Column that can be enhanced with metadata
-// using OfType/Nullable/WithLength/WithPrecisionAndScale methods.
-func (c *sqlmock) NewColumn(name string) *Column {
-	return NewColumn(name)
-}
diff --git a/sqlmock_before_go18.go b/sqlmock_before_go18.go
index 1a5b63a..9965e78 100644
--- a/sqlmock_before_go18.go
+++ b/sqlmock_before_go18.go
@@ -9,6 +9,12 @@ import (
 	"time"
 )
 
+// Sqlmock interface for Go up to 1.7
+type Sqlmock interface {
+	// Embed common methods
+	SqlmockCommon
+}
+
 type namedValue struct {
 	Name    string
 	Ordinal int
diff --git a/sqlmock_go18.go b/sqlmock_go18.go
index dc37b18..f268900 100644
--- a/sqlmock_go18.go
+++ b/sqlmock_go18.go
@@ -11,6 +11,19 @@ import (
 	"time"
 )
 
+// Sqlmock interface for Go 1.8+
+type Sqlmock interface {
+	// Embed common methods
+	SqlmockCommon
+
+	// NewRowsWithColumnDefinition allows Rows to be created from a
+	// sql driver.Value slice with a definition of sql metadata
+	NewRowsWithColumnDefinition(columns ...*Column) *Rows
+
+	// New Column allows to create a Column
+	NewColumn(name string) *Column
+}
+
 // ErrCancelled defines an error value, which can be expected in case of
 // such cancellation error.
 var ErrCancelled = errors.New("canceling query due to user request")
@@ -327,3 +340,17 @@ func (c *sqlmock) exec(query string, args []driver.NamedValue) (*ExpectedExec, e
 }
 
 // @TODO maybe add ExpectedBegin.WithOptions(driver.TxOptions)
+
+// NewRowsWithColumnDefinition allows Rows to be created from a
+// sql driver.Value slice with a definition of sql metadata
+func (c *sqlmock) NewRowsWithColumnDefinition(columns ...*Column) *Rows {
+	r := NewRowsWithColumnDefinition(columns...)
+	r.converter = c.converter
+	return r
+}
+
+// NewColumn allows to create a Column that can be enhanced with metadata
+// using OfType/Nullable/WithLength/WithPrecisionAndScale methods.
+func (c *sqlmock) NewColumn(name string) *Column {
+	return NewColumn(name)
+}