diff --git a/src/core/src/main/java/org/tio/client/ConnectionCompletionHandler.java b/src/core/src/main/java/org/tio/client/ConnectionCompletionHandler.java
index 68b25e70..14c54d44 100644
--- a/src/core/src/main/java/org/tio/client/ConnectionCompletionHandler.java
+++ b/src/core/src/main/java/org/tio/client/ConnectionCompletionHandler.java
@@ -143,7 +143,7 @@ private void handler(Void result, ConnectionCompletionVo attachment, Throwable t
 						} else {
 							if (clientAioListener != null) {
 								if (isConnected) {
-									channelContext.stat.heartbeatTimeoutCount = 0;
+									channelContext.stat.heartbeatTimeoutCount.set(0);
 									channelContext.setCloseCode(CloseCode.INIT_STATUS);
 								}
 								clientAioListener.onAfterConnected(channelContext, isConnected, isReconnect);