diff --git a/ide/vs2017/mimalloc-override.vcxproj b/ide/vs2017/mimalloc-override.vcxproj
index 5fad3cf1..6c1020ea 100644
--- a/ide/vs2017/mimalloc-override.vcxproj
+++ b/ide/vs2017/mimalloc-override.vcxproj
@@ -214,6 +214,7 @@
     <ClInclude Include="$(ProjectDir)..\..\include\mimalloc-internal.h" />
     <ClInclude Include="$(ProjectDir)..\..\include\mimalloc.h" />
     <ClInclude Include="..\..\include\mimalloc-atomic.h" />
+    <ClInclude Include="..\..\include\mimalloc-override.h" />
     <ClInclude Include="..\..\include\mimalloc-types.h" />
   </ItemGroup>
   <ItemGroup>
diff --git a/ide/vs2017/mimalloc-override.vcxproj.filters b/ide/vs2017/mimalloc-override.vcxproj.filters
index a39667f3..df0bf5ed 100644
--- a/ide/vs2017/mimalloc-override.vcxproj.filters
+++ b/ide/vs2017/mimalloc-override.vcxproj.filters
@@ -23,6 +23,9 @@
     <ClInclude Include="..\..\include\mimalloc-atomic.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\mimalloc-override.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="..\..\src\alloc.c">
diff --git a/ide/vs2017/mimalloc.vcxproj b/ide/vs2017/mimalloc.vcxproj
index 86268f74..3310e642 100644
--- a/ide/vs2017/mimalloc.vcxproj
+++ b/ide/vs2017/mimalloc.vcxproj
@@ -250,6 +250,7 @@
     <ClInclude Include="$(ProjectDir)..\..\include\mimalloc-internal.h" />
     <ClInclude Include="$(ProjectDir)..\..\include\mimalloc.h" />
     <ClInclude Include="..\..\include\mimalloc-atomic.h" />
+    <ClInclude Include="..\..\include\mimalloc-override.h" />
     <ClInclude Include="..\..\include\mimalloc-types.h" />
   </ItemGroup>
   <Import Project="$(VCTargetsPath)\Microsoft.Cpp.targets" />
diff --git a/ide/vs2017/mimalloc.vcxproj.filters b/ide/vs2017/mimalloc.vcxproj.filters
index 8bdeccf9..bffbb57f 100644
--- a/ide/vs2017/mimalloc.vcxproj.filters
+++ b/ide/vs2017/mimalloc.vcxproj.filters
@@ -70,5 +70,8 @@
     <ClInclude Include="..\..\include\mimalloc-atomic.h">
       <Filter>Header Files</Filter>
     </ClInclude>
+    <ClInclude Include="..\..\include\mimalloc-override.h">
+      <Filter>Header Files</Filter>
+    </ClInclude>
   </ItemGroup>
-</Project>
+</Project>
\ No newline at end of file
diff --git a/include/mimalloc-override.h b/include/mimalloc-override.h
index 9d26ab28..f6149514 100644
--- a/include/mimalloc-override.h
+++ b/include/mimalloc-override.h
@@ -39,10 +39,10 @@ including this header is not necessary.
 
 #define _strdup(s)              mi_strdup(s)
 #define _strndup(s)             mi_strndup(s)
-#define _wcsdup(s)              mi_wcsdup(s)
+#define _wcsdup(s)              (wchar_t*)mi_wcsdup((const unsigned short*)(s))
 #define _mbsdup(s)              mi_mbsdup(s)
 #define _dupenv_s(b,n,v)        mi_dupenv_s(b,n,v)
-#define _wdupenv_s(b,n,v)       mi_wdupenv_s(b,n,v)
+#define _wdupenv_s(b,n,v)       mi_wdupenv_s((unsigned short*)(b),n,(const unsigned short*)(v))
 
 // Various Posix and Unix variants
 #define reallocf(p,n)           mi_reallocf(p,n)
diff --git a/include/mimalloc.h b/include/mimalloc.h
index 4726c4b8..be784511 100644
--- a/include/mimalloc.h
+++ b/include/mimalloc.h
@@ -246,10 +246,10 @@ mi_decl_export void  mi_option_set(mi_option_t option, long value);
 mi_decl_export void  mi_option_set_default(mi_option_t option, long value);
 
 
-// --------------------------------------------------------------------------------------------
-// mi prefixed implementations of various posix, Unix, Windows, and C++ allocation functions.
-// (This can be convenient when providing overrides of these functions.)
-// --------------------------------------------------------------------------------------------
+// -------------------------------------------------------------------------------------------------------
+// "mi" prefixed implementations of various posix, Unix, Windows, and C++ allocation functions.
+// (This can be convenient when providing overrides of these functions as done in `mimalloc-override.h`.)
+// -------------------------------------------------------------------------------------------------------
 
 mi_decl_export size_t mi_malloc_size(const void* p) mi_attr_noexcept;
 mi_decl_export size_t mi_malloc_usable_size(const void *p) mi_attr_noexcept;