diff --git a/ui/build/context.go b/ui/build/context.go
index 4a4352c..2fef0d0 100644
--- a/ui/build/context.go
+++ b/ui/build/context.go
@@ -48,7 +48,7 @@
 		c.Tracer.Begin(desc, c.Thread)
 	}
 	if c.Metrics != nil {
-		c.Metrics.EventTracer.Begin(name, desc, c.Thread)
+		c.Metrics.EventTracer.Begin(name, desc)
 	}
 }
 
@@ -58,7 +58,7 @@
 		c.Tracer.End(c.Thread)
 	}
 	if c.Metrics != nil {
-		c.Metrics.SetTimeMetrics(c.Metrics.EventTracer.End(c.Thread))
+		c.Metrics.SetTimeMetrics(c.Metrics.EventTracer.End())
 	}
 }