diff --git a/src/worksp/libffi/libffi.vcproj b/src/worksp/libffi/libffi.vcproj
index 522dd73caa..b12dc59f11 100644
--- a/src/worksp/libffi/libffi.vcproj
+++ b/src/worksp/libffi/libffi.vcproj
@@ -41,6 +41,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
+				AdditionalIncludeDirectories="..\libffi;..\..\foreign\libffi\include;..\..\foreign\libffi\src\x86"
 				PreprocessorDefinitions="WIN32;_DEBUG;_LIB"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"
@@ -160,6 +161,7 @@
 			<Tool
 				Name="VCCLCompilerTool"
 				Optimization="0"
+				AdditionalIncludeDirectories="..\libffi;..\..\foreign\libffi\include;..\..\foreign\libffi\src\x86"
 				PreprocessorDefinitions="WIN32;_DEBUG;_LIB"
 				MinimalRebuild="true"
 				BasicRuntimeChecks="3"