diff --git a/projects/openttd_vs80.vcproj.in b/projects/openttd_vs80.vcproj.in
--- a/projects/openttd_vs80.vcproj.in
+++ b/projects/openttd_vs80.vcproj.in
@@ -60,7 +60,7 @@
FavorSizeOrSpeed="2"
OmitFramePointers="true"
AdditionalIncludeDirectories="..\objs\langs;..\src\3rdparty\squirrel\include"
- PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE;WIN32_ENABLE_DIRECTMUSIC_SUPPORT;WITH_ZLIB;WITH_PNG;WITH_FREETYPE;WITH_ICU;ENABLE_NETWORK;WITH_PERSONAL_DIR;PERSONAL_DIR=\"OpenTTD\";WITH_ASSERT"
+ PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE;WIN32_ENABLE_DIRECTMUSIC_SUPPORT;WITH_ZLIB;WITH_LZO;WITH_PNG;WITH_FREETYPE;WITH_ICU;ENABLE_NETWORK;WITH_PERSONAL_DIR;PERSONAL_DIR=\"OpenTTD\";WITH_ASSERT"
StringPooling="true"
ExceptionHandling="1"
RuntimeLibrary="0"
@@ -97,7 +97,7 @@
/>