diff --git a/go-1-8/main.go b/go-1-8/main.go
index e36f530..54b964d 100644
--- a/go-1-8/main.go
+++ b/go-1-8/main.go
@@ -5,6 +5,8 @@ import (
 	"log"
 	"os"
 	"plugin"
+
+	"github.com/golang-rennes/demo-plugins/go-1-8/types"
 )
 
 func main() {
@@ -32,18 +34,18 @@ func registerPlugin(path string) (*Plugin, error) {
 		return nil, err
 	}
 
-	funcSymbol, err := p.Lookup("Greetings")
+	interfaceSymbol, err := p.Lookup("Greeter")
 	if err != nil {
 		return nil, err
 	}
 
-	greet := funcSymbol.(func(...string) string)
+	greet := *interfaceSymbol.(*types.Greeter)
 
 	log.Printf("Plugin successfully installed\n")
 
 	plugin := &Plugin{
-		Path:      path,
-		Greetings: greet,
+		Path:    path,
+		Greeter: greet,
 	}
 
 	return plugin, nil
diff --git a/go-1-8/reverse/reverse.go b/go-1-8/reverse/reverse.go
index 61157a2..8d9a487 100644
--- a/go-1-8/reverse/reverse.go
+++ b/go-1-8/reverse/reverse.go
@@ -3,8 +3,12 @@ package main
 import (
 	"C"
 	"strings"
+
+	"github.com/golang-rennes/demo-plugins/go-1-8/types"
 )
 
+type reverseGreeter struct{}
+
 func reverse(s string) (result string) {
 	for _, v := range s {
 		result = string(v) + result
@@ -12,7 +16,9 @@ func reverse(s string) (result string) {
 	return
 }
 
-func Greetings(args ...string) string {
+func (g reverseGreeter) Greetings(args ...string) string {
 	name := reverse(strings.Join(args, "_"))
 	return name
 }
+
+var Greeter = types.Greeter(reverseGreeter{})
diff --git a/go-1-8/types.go b/go-1-8/types.go
index fe0d93e..1c6ab0d 100644
--- a/go-1-8/types.go
+++ b/go-1-8/types.go
@@ -1,6 +1,8 @@
 package main
 
+import "github.com/golang-rennes/demo-plugins/go-1-8/types"
+
 type Plugin struct {
-	Path      string
-	Greetings func(...string) string
+	Path string
+	types.Greeter
 }
diff --git a/go-1-8/types/func.go b/go-1-8/types/func.go
new file mode 100644
index 0000000..7d45ec4
--- /dev/null
+++ b/go-1-8/types/func.go
@@ -0,0 +1,3 @@
+package types
+
+type MyFunc func(...string) string
diff --git a/go-1-8/types/interface.go b/go-1-8/types/interface.go
new file mode 100644
index 0000000..aba34ef
--- /dev/null
+++ b/go-1-8/types/interface.go
@@ -0,0 +1,5 @@
+package types
+
+type Greeter interface {
+	Greetings(args ...string) string
+}
diff --git a/go-1-8/world/world.go b/go-1-8/world/world.go
index aecb77d..3007581 100644
--- a/go-1-8/world/world.go
+++ b/go-1-8/world/world.go
@@ -3,8 +3,14 @@ package main
 import (
 	"C"
 	"strings"
+
+	"github.com/golang-rennes/demo-plugins/go-1-8/types"
 )
 
-func Greetings(args ...string) string {
+type worldGreeter struct{}
+
+func (g worldGreeter) Greetings(args ...string) string {
 	return "World " + strings.Join(args, " ")
 }
+
+var Greeter = types.Greeter(worldGreeter{})