diff --git a/dlls/msvcp90/msvcp90.spec b/dlls/msvcp90/msvcp90.spec
index 881908c0da6..f594990da7b 100644
--- a/dlls/msvcp90/msvcp90.spec
+++ b/dlls/msvcp90/msvcp90.spec
@@ -1726,8 +1726,8 @@
 @ cdecl -arch=win64 ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAAEAV01@AEBV01@@Z(ptr ptr) MSVCP_basic_string_char_append
 @ thiscall -arch=win32 ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@D@Z(ptr long) MSVCP_basic_string_char_append_ch
 @ cdecl -arch=win64 ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAAEAV01@D@Z(ptr long) MSVCP_basic_string_char_append_ch
-@ stub -arch=win32 ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@PBD@Z
-@ stub -arch=win64 ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAAEAV01@PEBD@Z
+@ thiscall -arch=win32 ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@PBD@Z(ptr str) MSVCP_basic_string_char_append_cstr
+@ cdecl -arch=win64 ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAAEAV01@PEBD@Z(ptr str) MSVCP_basic_string_char_append_cstr
 @ stub -arch=win32 ??Y?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QAEAAV01@ABV01@@Z
 @ stub -arch=win64 ??Y?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QEAAAEAV01@AEBV01@@Z
 @ stub -arch=win32 ??Y?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QAEAAV01@G@Z
@@ -1736,8 +1736,8 @@
 @ stub -arch=win64 ??Y?$basic_string@GU?$char_traits@G@std@@V?$allocator@G@2@@std@@QEAAAEAV01@PEBG@Z
 @ thiscall -arch=win32 ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@ABV01@@Z(ptr ptr) MSVCP_basic_string_wchar_append
 @ cdecl -arch=win64 ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@AEBV01@@Z(ptr ptr) MSVCP_basic_string_wchar_append
-@ stub -arch=win32 ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@PB_W@Z
-@ stub -arch=win64 ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@PEB_W@Z
+@ thiscall -arch=win32 ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@PB_W@Z(ptr wstr) MSVCP_basic_string_wchar_append_cstr
+@ cdecl -arch=win64 ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@PEB_W@Z(ptr wstr) MSVCP_basic_string_wchar_append_cstr
 @ thiscall -arch=win32 ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@_W@Z(ptr long) MSVCP_basic_string_wchar_append_ch
 @ cdecl -arch=win64 ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@_W@Z(ptr long) MSVCP_basic_string_wchar_append_ch
 @ stub -arch=win32 ??Y?$complex@M@std@@QAEAAV01@ABM@Z
diff --git a/dlls/msvcp90/string.c b/dlls/msvcp90/string.c
index 19c188234af..ddb0b516c4f 100644
--- a/dlls/msvcp90/string.c
+++ b/dlls/msvcp90/string.c
@@ -879,6 +879,8 @@ basic_string_char* __thiscall MSVCP_basic_string_char_append_cstr_len(
 
 /* ?append@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV12@PBD@Z */
 /* ?append@?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAAEAV12@PEBD@Z */
+/* ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QAEAAV01@PBD@Z */
+/* ??Y?$basic_string@DU?$char_traits@D@std@@V?$allocator@D@2@@std@@QEAAAEAV01@PEBD@Z */
 DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_char_append_cstr, 8)
 basic_string_char* __thiscall MSVCP_basic_string_char_append_cstr(
         basic_string_char *this, const char *append)
@@ -1547,6 +1549,8 @@ basic_string_wchar* __thiscall MSVCP_basic_string_wchar_append_cstr_len(
 
 /* ?append@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV12@PB_W@Z */
 /* ?append@?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV12@PEB_W@Z */
+/* ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QAEAAV01@PB_W@Z */
+/* ??Y?$basic_string@_WU?$char_traits@_W@std@@V?$allocator@_W@2@@std@@QEAAAEAV01@PEB_W@Z */
 DEFINE_THISCALL_WRAPPER(MSVCP_basic_string_wchar_append_cstr, 8)
 basic_string_wchar* __thiscall MSVCP_basic_string_wchar_append_cstr(
         basic_string_wchar *this, const wchar_t *append)