diff --git a/src/SkyApm.Core/Tracing/CarrierPropagator.cs b/src/SkyApm.Core/Tracing/CarrierPropagator.cs
index 7c2f7c43c134ba9547d1870ccafae68492118cfa..19a6946788de696e3a3075d2a535b11583b11b73 100644
--- a/src/SkyApm.Core/Tracing/CarrierPropagator.cs
+++ b/src/SkyApm.Core/Tracing/CarrierPropagator.cs
@@ -49,7 +49,7 @@ namespace SkyApm.Tracing
 
             foreach (var formatter in _carrierFormatters)
             {
-                if (formatter.Enable){}
+                if (formatter.Enable)
                     headerCollection.Add(formatter.Key, formatter.Encode(carrier));
             }
         }