diff --git a/mpd/mpd.go b/mpd/mpd.go
index ed4f8ab..ffac1cd 100644
--- a/mpd/mpd.go
+++ b/mpd/mpd.go
@@ -779,7 +779,7 @@ func NewWidevineContentProtection(wvHeader []byte) (*WidevineContentProtection,
 		if err != nil {
 			panic(err.Error())
 		}
-		psshBox, err := makePSSHBox(wvSystemID, wvHeader)
+		psshBox, err := MakePSSHBox(wvSystemID, wvHeader)
 		if err != nil {
 			return nil, err
 		}
@@ -853,7 +853,7 @@ func (as *AdaptationSet) AddNewContentProtectionSchemePlayreadyWithPSSH(pro stri
 		return nil, err
 	}
 
-	psshBox, err := makePSSHBox(prSystemID, proBin)
+	psshBox, err := MakePSSHBox(prSystemID, proBin)
 	if err != nil {
 		return nil, err
 	}
@@ -885,7 +885,7 @@ func (as *AdaptationSet) AddNewContentProtectionSchemePlayreadyV10WithPSSH(pro s
 		return nil, err
 	}
 
-	psshBox, err := makePSSHBox(prSystemID, proBin)
+	psshBox, err := MakePSSHBox(prSystemID, proBin)
 	if err != nil {
 		return nil, err
 	}
diff --git a/mpd/pssh.go b/mpd/pssh.go
index d558163..98a7112 100644
--- a/mpd/pssh.go
+++ b/mpd/pssh.go
@@ -6,7 +6,7 @@ import (
 	"fmt"
 )
 
-func makePSSHBox(systemID, payload []byte) ([]byte, error) {
+func MakePSSHBox(systemID, payload []byte) ([]byte, error) {
 	if len(systemID) != 16 {
 		return nil, fmt.Errorf("SystemID must be 16 bytes, was: %d", len(systemID))
 	}
diff --git a/mpd/pssh_test.go b/mpd/pssh_test.go
index 2ddf354..a681194 100644
--- a/mpd/pssh_test.go
+++ b/mpd/pssh_test.go
@@ -23,7 +23,7 @@ func TestMakePSSHBox_Widevine(t *testing.T) {
 		panic(err.Error())
 	}
 
-	psshBox, err := makePSSHBox(wvSystemID, payload)
+	psshBox, err := MakePSSHBox(wvSystemID, payload)
 	require.NoError(t, err)
 
 	require.EqualString(t, string(expectedPSSH), string(psshBox))
@@ -46,18 +46,18 @@ func TestMakePSSHBox_Playready(t *testing.T) {
 		panic(err.Error())
 	}
 
-	psshBox, err := makePSSHBox(wvSystemID, payload)
+	psshBox, err := MakePSSHBox(wvSystemID, payload)
 	require.NoError(t, err)
 
 	require.EqualString(t, string(expectedPSSH), string(psshBox))
 }
 
 func TestMakePSSHBox_BadSystemID(t *testing.T) {
-	_, err := makePSSHBox([]byte("meaningless byte array"), nil)
+	_, err := MakePSSHBox([]byte("meaningless byte array"), nil)
 	require.EqualError(t, err, "SystemID must be 16 bytes, was: 22")
 }
 
 func TestMakePSSHBox_NilSystemID(t *testing.T) {
-	_, err := makePSSHBox(nil, nil)
+	_, err := MakePSSHBox(nil, nil)
 	require.EqualError(t, err, "SystemID must be 16 bytes, was: 0")
 }