diff --git a/ports/win32/msvc8/makefsdata.vcproj b/ports/win32/msvc8/makefsdata.vcproj
index dba1837..6f509cd 100644
--- a/ports/win32/msvc8/makefsdata.vcproj
+++ b/ports/win32/msvc8/makefsdata.vcproj
@@ -40,7 +40,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
-				AdditionalIncludeDirectories="$(LWIP_DIR)\src\include,..\include"
+				AdditionalIncludeDirectories="$(LWIP_DIR)\src\include,$(LWIP_DIR)\src\include\ipv4,..\include"
 				PreprocessorDefinitions="WIN32;_DEBUG;_CONSOLE;_CRT_SECURE_NO_WARNINGS"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
@@ -118,7 +118,7 @@
 				Name="VCCLCompilerTool"
 				Optimization="2"
 				EnableIntrinsicFunctions="true"
-				AdditionalIncludeDirectories="$(LWIP_DIR)\src\include,..\include"
+				AdditionalIncludeDirectories="$(LWIP_DIR)\src\include,$(LWIP_DIR)\src\include\ipv4,..\include"
 				PreprocessorDefinitions="WIN32;NDEBUG;_CONSOLE;_CRT_SECURE_NO_WARNINGS"
 				RuntimeLibrary="2"
 				EnableFunctionLevelLinking="true"