diff --git a/opentracing.go b/opentracing.go
index d569e05..8597bc5 100644
--- a/opentracing.go
+++ b/opentracing.go
@@ -76,7 +76,7 @@ func (t *otTracer) Start(ctx context.Context, name string, opts ...tracer.SpanOp
 		}
 	}
 
-	sp.AddLabels(options.Labels)
+	sp.AddLabels(options.Labels...)
 
 	return tracer.NewSpanContext(ctx, sp), sp
 }