diff --git a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
index 187370eb36cae..5d0a3e31d0437 100644
--- a/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
+++ b/lldb/source/Plugins/Process/gdb-remote/GDBRemoteCommunication.cpp
@@ -1145,8 +1145,8 @@ Status GDBRemoteCommunication::StartDebugserverProcess(
       if (socket_pipe.CanWrite())
         socket_pipe.CloseWriteFileDescriptor();
       if (socket_pipe.CanRead()) {
-        char port_cstr[PATH_MAX] = {0};
-        port_cstr[0] = '\0';
+        // The port number may be up to "65535\0".
+        char port_cstr[6] = {0};
         size_t num_bytes = sizeof(port_cstr);
         // Read port from pipe with 10 second timeout.
         error = socket_pipe.ReadWithTimeout(