diff --git a/scripts/dump-guest-memory.py b/scripts/dump-guest-memory.py
index 09bec92b50..03fbf69f8a 100644
--- a/scripts/dump-guest-memory.py
+++ b/scripts/dump-guest-memory.py
@@ -564,7 +564,7 @@ shape and this command should mostly work."""
 
         vmcoreinfo = self.phys_memory_read(addr, size)
         if vmcoreinfo:
-            self.elf.add_vmcoreinfo_note(vmcoreinfo.tobytes())
+            self.elf.add_vmcoreinfo_note(bytes(vmcoreinfo))
 
     def invoke(self, args, from_tty):
         """Handles command invocation from gdb."""