diff --git a/fsgen/filesystem_creator.go b/fsgen/filesystem_creator.go
index 9dcbec1..63d0791 100644
--- a/fsgen/filesystem_creator.go
+++ b/fsgen/filesystem_creator.go
@@ -1163,6 +1163,10 @@
 
 	ctx.Phony("product_config_to_bp", generatedBp)
 
+	if !ctx.Config().KatiEnabled() {
+		// Cannot diff since the kati packaging rules will not be created.
+		return
+	}
 	var diffTestFiles []android.Path
 	for _, partitionType := range partitions.types() {
 		diffTestFile := f.createFileListDiffTest(ctx, partitionType, partitions.nameForType(partitionType))