diff --git a/terraform/diff.go b/terraform/diff.go
index 33b4a9896..e0e097e80 100644
--- a/terraform/diff.go
+++ b/terraform/diff.go
@@ -311,10 +311,6 @@ func (d *ModuleDiff) String() string {
 	return buf.String()
 }
 
-func (d *ModuleDiff) GoString() string {
-	return fmt.Sprintf("*%#v", *d)
-}
-
 // InstanceDiff is the diff of a resource from some state to another.
 type InstanceDiff struct {
 	mu             sync.Mutex