diff --git a/util/RTCContext.cpp b/util/RTCContext.cpp
index e9d88b6..768ae3c 100644
--- a/util/RTCContext.cpp
+++ b/util/RTCContext.cpp
@@ -12,7 +12,7 @@ void RTCContext::onConsumer(uint32_t msgId, const char* roomId, const char* peer
     std::cout << "RTCContext::onConsumer()" << std::endl;
     std::cout << "RTCContext::onConsumer(), msgId:" << msgId << ", roomId:" << consumerInfo.roomId << ", displayName:"
               << consumerInfo.displayName
-              << ", channelIndex:" << consumerInfo.channelIndex << std::endl;
+              << ", channelIndex:" << int(consumerInfo.channelIndex) << std::endl;
     if (isRecv_) {
         std::lock_guard<std::mutex> lock(mutex_);
         std::cout << "registerSoundLevelListener" << std::endl;