diff --git a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
index c6db92cef6..83bcda17d2 100644
--- a/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
+++ b/runtime/pack/dist/opt/termdebug/plugin/termdebug.vim
@@ -223,6 +223,11 @@ enddef
 
 def SanityCheck(): bool
   var gdb_cmd = GetCommand()[0]
+  var cwd = $'{getcwd()}/'
+  if exists('+shellslash') && !&shellslash
+    # on windows, need to handle backslash
+    cwd->substitute('\\', '/', 'g')
+  endif
   var is_check_ok = true
   # Need either the +terminal feature or +channel and the prompt buffer.
   # The terminal feature does not work with gdb on win32.
@@ -230,11 +235,11 @@ def SanityCheck(): bool
     err = 'Cannot debug, +channel feature is not supported'
   elseif (way is Way.Prompt) && !exists('*prompt_setprompt')
     err = 'Cannot debug, missing prompt buffer support'
-  elseif (way is Way.Prompt) && !empty(glob(gdb_cmd))
+  elseif (way is Way.Prompt) && !empty(glob($'{cwd}{gdb_cmd}'))
     err = $"You have a file/folder named '{gdb_cmd}' in the current directory Termdebug may not work properly. Please exit and rename such a file/folder."
-  elseif !empty(glob(asmbufname))
+  elseif !empty(glob($'{cwd}{asmbufname}'))
     err = $"You have a file/folder named '{asmbufname}' in the current directory Termdebug may not work properly. Please exit and rename such a file/folder."
-  elseif !empty(glob(varbufname))
+  elseif !empty(glob($'{cwd}{varbufname}'))
     err = $"You have a file/folder named '{varbufname}' in the current directory Termdebug may not work properly. Please exit and rename such a file/folder."
   elseif !executable(gdb_cmd)
     err = $"Cannot execute debugger program '{gdb_cmd}'"