diff --git a/lldb/source/Plugins/Process/wasm/ProcessWasm.cpp b/lldb/source/Plugins/Process/wasm/ProcessWasm.cpp
index 3ea3ea2a4684..5eeabec08655 100644
--- a/lldb/source/Plugins/Process/wasm/ProcessWasm.cpp
+++ b/lldb/source/Plugins/Process/wasm/ProcessWasm.cpp
@@ -104,7 +104,7 @@ llvm::Expected<std::vector<lldb::addr_t>>
 ProcessWasm::GetWasmCallStack(lldb::tid_t tid) {
   StreamString packet;
   packet.Printf("qWasmCallStack:");
-  packet.Printf("%llx", tid);
+  packet.Printf("%" PRIx64, tid);
 
   StringExtractorGDBRemote response;
   if (m_gdb_comm.SendPacketAndWaitForResponse(packet.GetString(), response) !=