diff --git a/mirai-core/src/commonMain/kotlin/network/protocol/packet/chat/voice/PttStore.kt b/mirai-core/src/commonMain/kotlin/network/protocol/packet/chat/voice/PttStore.kt
index c2960d69c..e442dba7d 100644
--- a/mirai-core/src/commonMain/kotlin/network/protocol/packet/chat/voice/PttStore.kt
+++ b/mirai-core/src/commonMain/kotlin/network/protocol/packet/chat/voice/PttStore.kt
@@ -171,7 +171,7 @@ internal class PttStore {
                             buType = 3,
                             innerIp = 0,
                             buildVer = "8.5.5".encodeToByteArray(),
-                            codec = 0,
+                            codec = ptt.format,
                             reqTerm = 5,
                             reqPlatformType = 9,
                         )