diff --git a/projects/VC7.1/SimGear.vcproj b/projects/VC7.1/SimGear.vcproj
index c0efc9db..b305088b 100755
--- a/projects/VC7.1/SimGear.vcproj
+++ b/projects/VC7.1/SimGear.vcproj
@@ -23,7 +23,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				InlineFunctionExpansion="1"
-				AdditionalIncludeDirectories="..\..;..\..\simgear;..\..\..;..\..\..\install\msvc71\OpenSceneGraph\include;..\..\..\3rdparty\include;&quot;..\..\..\pthreads-w32-2-7-0-release&quot;"
+				AdditionalIncludeDirectories="..\..;..\..\simgear;..\..\..;..\..\..\install\msvc71\OpenSceneGraph\include;..\..\..\3rdparty\include;&quot;..\..\..\pthreads-w32-2-7-0-release&quot;;..\..\..\boost_1_36_0"
 				PreprocessorDefinitions="HAVE_CONFIG_H,NDEBUG,WIN32;_USE_MATH_DEFINES;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS"
 				StringPooling="TRUE"
 				RuntimeLibrary="2"
@@ -75,7 +75,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
-				AdditionalIncludeDirectories="..\..;..\..\simgear;..\..\..;..\..\..\install\msvc71\OpenSceneGraph\include;..\..\..\3rdparty\include;&quot;..\..\..\pthreads-w32-2-7-0-release&quot;"
+				AdditionalIncludeDirectories="..\..;..\..\simgear;..\..\..;..\..\..\install\msvc71\OpenSceneGraph\include;..\..\..\3rdparty\include;&quot;..\..\..\pthreads-w32-2-7-0-release&quot;;..\..\..\boost_1_36_0"
 				PreprocessorDefinitions="HAVE_CONFIG_H,_DEBUG,WIN32;_USE_MATH_DEFINES;_CRT_SECURE_NO_WARNINGS;_CRT_NONSTDC_NO_WARNINGS"
 				BasicRuntimeChecks="3"
 				RuntimeLibrary="3"