diff --git a/app/ldiff/diff.go b/app/ldiff/diff.go
index 48661373..5a99bbb1 100644
--- a/app/ldiff/diff.go
+++ b/app/ldiff/diff.go
@@ -124,7 +124,6 @@ type diff struct {
 	compareThreshold int
 	ranges           *hashRanges
 	mu               sync.RWMutex
-	id               int
 }
 
 // Compare implements skiplist interface