diff --git a/debian/rules b/debian/rules
index b6a420b..61d76c8 100755
--- a/debian/rules
+++ b/debian/rules
@@ -24,7 +24,7 @@ build-arch-stamp:
 build-indep: build-indep-stamp
 build-indep-stamp:
 	dh_testdir
-	oggenc sound/*.wav
+	for X in sound/*.wav; do oggenc --serial $$X $$X; done
 	touch $@
 
 clean: