diff --git a/server/uidassigner/main.go b/server/uidassigner/main.go
index 0a00382461b9ad5487637999494c3067f46b0c92..3150f85e4b125473338a9dcc532bfb27774a6b9a 100644
--- a/server/uidassigner/main.go
+++ b/server/uidassigner/main.go
@@ -24,7 +24,7 @@ var instanceIdx = flag.Uint64("instanceIdx", 0,
 	"Only pick entities, where Fingerprint % numInstance == instanceIdx.")
 var numInstances = flag.Uint64("numInstances", 1,
 	"Total number of instances among which uid assigning is shared")
-var uidDir = flag.String("uidpostings", "",
+var uidDir = flag.String("uids", "",
 	"Directory to store xid to uid posting lists")
 var cpuprofile = flag.String("cpuprofile", "", "write cpu profile to file")
 var memprofile = flag.String("memprofile", "", "write memory profile to file")