diff --git a/services/audio_policy/server/domain/device/src/audio_device_common.cpp b/services/audio_policy/server/domain/device/src/audio_device_common.cpp
index ac12e5dd1cb024f1909f3510cee1ffd77522b876..45b5826ca3b6f829e37223852dd907eb7a10dc42 100644
--- a/services/audio_policy/server/domain/device/src/audio_device_common.cpp
+++ b/services/audio_policy/server/domain/device/src/audio_device_common.cpp
@@ -207,6 +207,10 @@ std::vector<std::shared_ptr<AudioDeviceDescriptor>> AudioDeviceCommon::GetPrefer
 
     if (networkId == LOCAL_NETWORK_ID) {
         std::shared_ptr<AudioDeviceDescriptor> desc = audioRouterCenter_.FetchInputDevice(captureInfo.sourceType, -1);
+        if (desc == nullptr) {
+            AUDIO_ERR_LOG("desc is nullptr");
+            return {};
+        }
         if (desc->deviceType_ == DEVICE_TYPE_NONE && (captureInfo.sourceType == SOURCE_TYPE_PLAYBACK_CAPTURE ||
             captureInfo.sourceType == SOURCE_TYPE_REMOTE_CAST)) {
             desc->deviceType_ = DEVICE_TYPE_INVALID;