diff --git a/reactos/dll/win32/msvcrt/msvcrt.spec b/reactos/dll/win32/msvcrt/msvcrt.spec
index 8587c0d9e66..2008a214d26 100644
--- a/reactos/dll/win32/msvcrt/msvcrt.spec
+++ b/reactos/dll/win32/msvcrt/msvcrt.spec
@@ -1304,7 +1304,6 @@
 # stub mbsrtowcs
 # stub mbsrtowcs_s
 @ cdecl mbstowcs(ptr str long)
-@ cdecl mbstowcs_s(ptr ptr long str long)
 @ cdecl mbtowc(wstr str long)
 @ cdecl memchr(ptr long long)
 @ cdecl memcmp(ptr ptr long)