1 files changed, 2 insertions, 1 deletions
diff --git a/src/DirectConnection.cpp b/src/DirectConnection.cpp
index 6001ebc..748a936 100644
--- a/src/DirectConnection.cpp
+++ b/src/DirectConnection.cpp
@@ -119,7 +119,8 @@ namespace sibs
                 }
                 sentSizeTotal += sentSize;
             }
-            sendDataCallbackFunc(PubSubResult::OK, "");
+            if(sendDataCallbackFunc)
+                sendDataCallbackFunc(PubSubResult::OK, "");
         }).detach();
     }