diff --git a/tools/memory_tool.py b/tools/memory_tool.py
index 236760a464a..42737f66c4f 100644
--- a/tools/memory_tool.py
+++ b/tools/memory_tool.py
@@ -156,10 +156,7 @@ class MemoryStore:
             yield
             return
 
-        if msvcrt and (not lock_path.exists() or lock_path.stat().st_size == 0):
-            lock_path.write_text(" ", encoding="utf-8")
-
-        fd = open(lock_path, "r+" if msvcrt else "a+", encoding="utf-8")
+        fd = open(lock_path, "a+", encoding="utf-8")
         try:
             if fcntl:
                 fcntl.flock(fd, fcntl.LOCK_EX)