diff --git a/context.go b/context.go
index daf91e5..5e604a5 100644
--- a/context.go
+++ b/context.go
@@ -77,7 +77,7 @@ func (h *jobHelper) Jid() string {
 	return h.job.Jid
 }
 func (h *jobHelper) Bid() string {
-	if b, ok := h.job.GetCustom("bid"); ok {
+	if b, ok := h.job.GetCustom("_bid"); ok {
 		return b.(string)
 	}
 	return ""
diff --git a/context_test.go b/context_test.go
index 9ccfba3..d9e0ccb 100644
--- a/context_test.go
+++ b/context_test.go
@@ -49,7 +49,7 @@ func TestBatchContext(t *testing.T) {
 
 	job := faktory.NewJob("something", 1, 2)
 	job.SetCustom("track", 1)
-	job.SetCustom("bid", "nosuchbatch")
+	job.SetCustom("_bid", "nosuchbatch")
 
 	ctx := jobContext(pool, job)
 	help := HelperFor(ctx)