diff --git a/cmd/restic/cmd_forget.go b/cmd/restic/cmd_forget.go
index 976db4d0d..1472e02b3 100644
--- a/cmd/restic/cmd_forget.go
+++ b/cmd/restic/cmd_forget.go
@@ -261,7 +261,7 @@ func runForget(ctx context.Context, opts ForgetOptions, pruneOptions PruneOption
 			}
 
 			var key data.SnapshotGroupKey
-			if json.Unmarshal([]byte(k), &key) != nil {
+			if err := json.Unmarshal([]byte(k), &key); err != nil {
 				return err
 			}