diff --git a/reactos/include/c++/typeinfo b/reactos/include/c++/typeinfo
index 0db99292e9b..b364733e4e9 100644
--- a/reactos/include/c++/typeinfo
+++ b/reactos/include/c++/typeinfo
@@ -13,7 +13,7 @@ namespace std
     class type_info {
     public:
         virtual ~type_info();
-        bool before (const type_info& rhs) const;
+        bool before (const type_info& arg) const
             { return __name < __arg.__name; }
         bool operator==(const type_info& __arg) const
             { return __name == __arg.__name; }
diff --git a/reactos/lib/sdk/crt/msvcrtex.cmake b/reactos/lib/sdk/crt/msvcrtex.cmake
index 62b6dcf1bde..b54f1766334 100644
--- a/reactos/lib/sdk/crt/msvcrtex.cmake
+++ b/reactos/lib/sdk/crt/msvcrtex.cmake
@@ -62,7 +62,7 @@ else()
 endif()
 
 add_library(msvcrtex ${MSVCRTEX_SOURCE})
-add_target_compile_definitions(msvcrtex _M_CEE_PURE)
+add_target_compile_definitions(msvcrtex _DLL)
 set_source_files_properties(startup/crtdll.c PROPERTIES COMPILE_DEFINITIONS CRTDLL)
 
 if(NOT MSVC)
diff --git a/reactos/ntoskrnl/ke/i386/cpu.c b/reactos/ntoskrnl/ke/i386/cpu.c
index f40e6308fb9..f07b6906327 100644
--- a/reactos/ntoskrnl/ke/i386/cpu.c
+++ b/reactos/ntoskrnl/ke/i386/cpu.c
@@ -1289,7 +1289,7 @@ KiIsNpxErrataPresent(VOID)
         fdiv Value2
         fmul Value2
         fld Value1
-        fsubp
+        fsubp st(1), st(0)
         fistp ErrataPresent
     };
 #endif