diff --git a/context.go b/context.go
index 8260391..cf1ab08 100644
--- a/context.go
+++ b/context.go
@@ -5,6 +5,8 @@ import (
   "fmt"
   "errors"
   "runtime"
+  "crypto/sha512"
+  "encoding/binary"
 )
 
 type NodeType string
@@ -13,12 +15,6 @@ func (node NodeType) Hash() uint64 {
   return binary.BigEndian.Uint64(hash[(len(hash)-9):(len(hash)-1)])
 }
 
-type PolicyType string
-func (policy PolicyType) Hash() uint64 {
-  hash := sha512.Sum512([]byte(fmt.Sprintf("POLICY: %s", string(policy))))
-  return binary.BigEndian.Uint64(hash[(len(hash)-9):(len(hash)-1)])
-}
-
 type ExtType string
 func (ext ExtType) Hash() uint64 {
   hash := sha512.Sum512([]byte(fmt.Sprintf("EXTENSION: %s", string(ext))))
diff --git a/node.go b/node.go
index 3a7d741..4d9a0d0 100644
--- a/node.go
+++ b/node.go
@@ -9,7 +9,6 @@ import (
   "fmt"
   "encoding/binary"
   "encoding/json"
-  "crypto/sha512"
   "sync/atomic"
 )
 
diff --git a/policy.go b/policy.go
index b2c5b80..3d3d544 100644
--- a/policy.go
+++ b/policy.go
@@ -3,6 +3,8 @@ package graphvent
 import (
   "encoding/json"
   "fmt"
+  "crypto/sha512"
+  "encoding/binary"
 )
 
 type PolicyType string