diff --git a/src/tools/msvc/MSBuildProject.pm b/src/tools/msvc/MSBuildProject.pm
index ac99345..1c20d0a 100644
--- a/src/tools/msvc/MSBuildProject.pm
+++ b/src/tools/msvc/MSBuildProject.pm
@@ -290,7 +290,20 @@ sub WriteItemDefinitionGroup
     <ClCompile>
       <Optimization>$p->{opt}</Optimization>
       <AdditionalIncludeDirectories>$self->{prefixincludes}src/include;src/include/port/win32;src/include/port/win32_msvc;$includes\%(AdditionalIncludeDirectories)</AdditionalIncludeDirectories>
+EOF
+	if ($targetmachine eq "MachineX64")
+	{
+		print $f <<EOF;
       <PreprocessorDefinitions>WIN32;_WINDOWS;__WINDOWS__;__WIN32__;EXEC_BACKEND;WIN32_STACK_RLIMIT=4194304;_CRT_SECURE_NO_DEPRECATE;_CRT_NONSTDC_NO_DEPRECATE$self->{defines}$p->{defs}\%(PreprocessorDefinitions)</PreprocessorDefinitions>
+EOF
+	}
+	else
+	{
+		print $f <<EOF;
+      <PreprocessorDefinitions>WIN32;_WINDOWS;__WINDOWS__;__WIN32__;EXEC_BACKEND;WIN32_STACK_RLIMIT=4194304;_CRT_SECURE_NO_DEPRECATE;_USE_32BIT_TIME_T;_CRT_NONSTDC_NO_DEPRECATE$self->{defines}$p->{defs}\%(PreprocessorDefinitions)</PreprocessorDefinitions>
+EOF
+	}
+print $f <<EOF;
       <StringPooling>$p->{strpool}</StringPooling>
       <RuntimeLibrary>$p->{runtime}</RuntimeLibrary>
       <DisableSpecificWarnings>$self->{disablewarnings};\%(DisableSpecificWarnings)</DisableSpecificWarnings>