diff --git a/dlls/msvcp70/msvcp70.spec b/dlls/msvcp70/msvcp70.spec
index 00303e65265..397e3f8061d 100644
--- a/dlls/msvcp70/msvcp70.spec
+++ b/dlls/msvcp70/msvcp70.spec
@@ -3974,47 +3974,47 @@
 @ extern -arch=win64 ?npos@?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@2_KB MSVCP_basic_string_wchar_npos
 @ extern -arch=win32 ?npos@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@2IB MSVCP_basic_string_wchar_npos
 @ extern -arch=win64 ?npos@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@2_KB MSVCP_basic_string_wchar_npos
-@ stub -arch=win32 ?open@?$basic_filebuf@DU?$char_traits@D@std@@@std@@QAEPAV12@PBDH@Z
-@ stub -arch=win64 ?open@?$basic_filebuf@DU?$char_traits@D@std@@@std@@QEAAPEAV12@PEBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_filebuf@DU?$char_traits@D@std@@@std@@QAEPAV12@PBDH@Z(ptr str long) basic_filebuf_char_open_mode
+@ cdecl -arch=win64 ?open@?$basic_filebuf@DU?$char_traits@D@std@@@std@@QEAAPEAV12@PEBDH@Z(ptr str long) basic_filebuf_char_open_mode
 @ thiscall -arch=win32 ?open@?$basic_filebuf@DU?$char_traits@D@std@@@std@@QAEPAV12@PBDI@Z(ptr str long) basic_filebuf_char_open_mode
 @ cdecl -arch=win64 ?open@?$basic_filebuf@DU?$char_traits@D@std@@@std@@QEAAPEAV12@PEBDI@Z(ptr str long) basic_filebuf_char_open_mode
-@ stub -arch=win32 ?open@?$basic_filebuf@GU?$char_traits@G@std@@@std@@QAEPAV12@PBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_filebuf@GU?$char_traits@G@std@@@std@@QAEPAV12@PBDH@Z(ptr str long) basic_filebuf_short_open_mode
 @ thiscall -arch=win32 ?open@?$basic_filebuf@GU?$char_traits@G@std@@@std@@QAEPAV12@PBDI@Z(ptr str long) basic_filebuf_short_open_mode
 @ cdecl -arch=win64 ?open@?$basic_filebuf@GU?$char_traits@G@std@@@std@@QEAAPEAV12@PEBDI@Z(ptr str long) basic_filebuf_short_open_mode
-@ stub -arch=win32 ?open@?$basic_filebuf@_WU?$char_traits@_W@std@@@std@@QAEPAV12@PBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_filebuf@_WU?$char_traits@_W@std@@@std@@QAEPAV12@PBDH@Z(ptr str long) basic_filebuf_wchar_open_mode
 @ thiscall -arch=win32 ?open@?$basic_filebuf@_WU?$char_traits@_W@std@@@std@@QAEPAV12@PBDI@Z(ptr str long) basic_filebuf_wchar_open_mode
 @ cdecl -arch=win64 ?open@?$basic_filebuf@_WU?$char_traits@_W@std@@@std@@QEAAPEAV12@PEBDI@Z(ptr str long) basic_filebuf_wchar_open_mode
-@ stub -arch=win32 ?open@?$basic_fstream@DU?$char_traits@D@std@@@std@@QAEXPBDH@Z
-@ stub -arch=win64 ?open@?$basic_fstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_fstream@DU?$char_traits@D@std@@@std@@QAEXPBDH@Z(ptr str long) basic_fstream_char_open_old
+@ cdecl -arch=win64 ?open@?$basic_fstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDH@Z(ptr str long) basic_fstream_char_open_old
 @ thiscall -arch=win32 ?open@?$basic_fstream@DU?$char_traits@D@std@@@std@@QAEXPBDI@Z(ptr str long) basic_fstream_char_open_old
 @ cdecl -arch=win64 ?open@?$basic_fstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_fstream_char_open_old
-@ stub -arch=win32 ?open@?$basic_fstream@GU?$char_traits@G@std@@@std@@QAEXPBDH@Z
-@ stub -arch=win64 ?open@?$basic_fstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_fstream@GU?$char_traits@G@std@@@std@@QAEXPBDH@Z(ptr str long) basic_fstream_wchar_open_old
+@ cdecl -arch=win64 ?open@?$basic_fstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDH@Z(ptr str long) basic_fstream_wchar_open_old
 @ thiscall -arch=win32 ?open@?$basic_fstream@GU?$char_traits@G@std@@@std@@QAEXPBDI@Z(ptr str long) basic_fstream_wchar_open_old
 @ cdecl -arch=win64 ?open@?$basic_fstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_fstream_wchar_open_old
-@ stub -arch=win32 ?open@?$basic_fstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_fstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDH@Z(ptr str long) basic_fstream_wchar_open_old
 @ thiscall -arch=win32 ?open@?$basic_fstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDI@Z(ptr str long) basic_fstream_wchar_open_old
 @ cdecl -arch=win64 ?open@?$basic_fstream@_WU?$char_traits@_W@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_fstream_wchar_open_old
-@ stub -arch=win32 ?open@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QAEXPBDH@Z
-@ stub -arch=win64 ?open@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QAEXPBDH@Z(ptr str long) basic_ifstream_char_open_old
+@ cdecl -arch=win64 ?open@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDH@Z(ptr str long) basic_ifstream_char_open_old
 @ thiscall -arch=win32 ?open@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QAEXPBDI@Z(ptr str long) basic_ifstream_char_open_old
 @ cdecl -arch=win64 ?open@?$basic_ifstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_ifstream_char_open_old
-@ stub -arch=win32 ?open@?$basic_ifstream@GU?$char_traits@G@std@@@std@@QAEXPBDH@Z
-@ stub -arch=win64 ?open@?$basic_ifstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_ifstream@GU?$char_traits@G@std@@@std@@QAEXPBDH@Z(ptr str long) basic_ifstream_wchar_open_old
+@ cdecl -arch=win64 ?open@?$basic_ifstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDH@Z(ptr str long) basic_ifstream_wchar_open_old
 @ thiscall -arch=win32 ?open@?$basic_ifstream@GU?$char_traits@G@std@@@std@@QAEXPBDI@Z(ptr str long) basic_ifstream_wchar_open_old
 @ cdecl -arch=win64 ?open@?$basic_ifstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_ifstream_wchar_open_old
-@ stub -arch=win32 ?open@?$basic_ifstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_ifstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDH@Z(ptr str long) basic_ifstream_wchar_open_old
 @ thiscall -arch=win32 ?open@?$basic_ifstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDI@Z(ptr str long) basic_ifstream_wchar_open_old
 @ cdecl -arch=win64 ?open@?$basic_ifstream@_WU?$char_traits@_W@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_ifstream_wchar_open_old
-@ stub -arch=win32 ?open@?$basic_ofstream@DU?$char_traits@D@std@@@std@@QAEXPBDH@Z
-@ stub -arch=win64 ?open@?$basic_ofstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_ofstream@DU?$char_traits@D@std@@@std@@QAEXPBDH@Z(ptr str long) basic_ofstream_char_open_old
+@ cdecl -arch=win64 ?open@?$basic_ofstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDH@Z(ptr str long) basic_ofstream_char_open_old
 @ thiscall -arch=win32 ?open@?$basic_ofstream@DU?$char_traits@D@std@@@std@@QAEXPBDI@Z(ptr str long) basic_ofstream_char_open_old
 @ cdecl -arch=win64 ?open@?$basic_ofstream@DU?$char_traits@D@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_ofstream_char_open_old
-@ stub -arch=win32 ?open@?$basic_ofstream@GU?$char_traits@G@std@@@std@@QAEXPBDH@Z
-@ stub -arch=win64 ?open@?$basic_ofstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_ofstream@GU?$char_traits@G@std@@@std@@QAEXPBDH@Z(ptr str long) basic_ofstream_wchar_open_old
+@ cdecl -arch=win64 ?open@?$basic_ofstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDH@Z(ptr str long) basic_ofstream_wchar_open_old
 @ thiscall -arch=win32 ?open@?$basic_ofstream@GU?$char_traits@G@std@@@std@@QAEXPBDI@Z(ptr str long) basic_ofstream_wchar_open_old
 @ cdecl -arch=win64 ?open@?$basic_ofstream@GU?$char_traits@G@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_ofstream_wchar_open_old
-@ stub -arch=win32 ?open@?$basic_ofstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDH@Z
+@ thiscall -arch=win32 ?open@?$basic_ofstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDH@Z(ptr str long) basic_ofstream_wchar_open_old
 @ thiscall -arch=win32 ?open@?$basic_ofstream@_WU?$char_traits@_W@std@@@std@@QAEXPBDI@Z(ptr str long) basic_ofstream_wchar_open_old
 @ cdecl -arch=win64 ?open@?$basic_ofstream@_WU?$char_traits@_W@std@@@std@@QEAAXPEBDI@Z(ptr str long) basic_ofstream_wchar_open_old
 @ stub -arch=win32 ?open@?$messages@D@std@@QBEHABV?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@2@ABVlocale@2@@Z