diff --git a/dlls/kernel32/path.c b/dlls/kernel32/path.c
index 63d977b..7d0dc35 100644
--- a/dlls/kernel32/path.c
+++ b/dlls/kernel32/path.c
@@ -205,8 +205,12 @@ static BOOL add_boot_rename_entry( LPCWSTR source, LPCWSTR dest, DWORD flags )
     if (dest)
     {
         if (flags & MOVEFILE_REPLACE_EXISTING)
+        {
             *p++ = '!';
-        memcpy( p, dest_name.Buffer, len2 );
+            memcpy( p, dest_name.Buffer, len2 - sizeof(WCHAR) );
+        }
+        else
+            memcpy( p, dest_name.Buffer, len2 );
         DataSize += len2;
     }
     else