diff --git a/ports/unix/modos.c b/ports/unix/modos.c
index 1414f87661..f2784b1d68 100644
--- a/ports/unix/modos.c
+++ b/ports/unix/modos.c
@@ -33,6 +33,9 @@
 #include <stdlib.h>
 #include <string.h>
 #include <dirent.h>
+#ifdef _MSC_VER
+#include <direct.h> // For mkdir
+#endif
 #include "py/mpconfig.h"
 
 #include "py/runtime.h"
diff --git a/ports/windows/msvc/common.props b/ports/windows/msvc/common.props
index 2545a36469..fcad5aeb6b 100644
--- a/ports/windows/msvc/common.props
+++ b/ports/windows/msvc/common.props
@@ -13,7 +13,7 @@
   <ItemDefinitionGroup>
     <ClCompile>
       <AdditionalIncludeDirectories>$(PyIncDirs);%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
-      <PreprocessorDefinitions>_USE_MATH_DEFINES;_CRT_SECURE_NO_WARNINGS;_MBCS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
+      <PreprocessorDefinitions>_USE_MATH_DEFINES;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS;_MBCS;%(PreprocessorDefinitions)</PreprocessorDefinitions>
       <SDLCheck>false</SDLCheck>
       <WarningLevel>Level1</WarningLevel>
       <ExceptionHandling>false</ExceptionHandling>
diff --git a/ports/windows/msvc/sys/time.h b/ports/windows/msvc/sys/time.h
index 7c95d409e4..bb41ec36db 100644
--- a/ports/windows/msvc/sys/time.h
+++ b/ports/windows/msvc/sys/time.h
@@ -29,4 +29,6 @@
 // Get the definitions for timeval etc
 #include <Winsock2.h>
 
+int gettimeofday(struct timeval *tp, struct timezone *tz);
+
 #endif // MICROPY_INCLUDED_WINDOWS_MSVC_SYS_TIME_H