diff --git a/graph/service.go b/graph/service.go
index 675e12a1a9..354c57eaff 100644
--- a/graph/service.go
+++ b/graph/service.go
@@ -151,7 +151,6 @@ func (s *TagStore) CmdLookup(job *engine.Job) engine.Status {
 		out.Set("Os", image.OS)
 		out.SetInt64("Size", image.Size)
 		out.SetInt64("VirtualSize", image.GetParentsSize(0)+image.Size)
-		out.Set("Checksum", image.Checksum)
 		if _, err = out.WriteTo(job.Stdout); err != nil {
 			return job.Error(err)
 		}
diff --git a/image/image.go b/image/image.go
index 01300069f4..27554d972a 100644
--- a/image/image.go
+++ b/image/image.go
@@ -31,7 +31,6 @@ type Image struct {
 	Config          *runconfig.Config `json:"config,omitempty"`
 	Architecture    string            `json:"architecture,omitempty"`
 	OS              string            `json:"os,omitempty"`
-	Checksum        string            `json:"checksum"`
 	Size            int64
 
 	graph Graph