diff --git a/build/libass/libass.vcxproj b/build/libass/libass.vcxproj
index 61408f354..bf3047710 100644
--- a/build/libass/libass.vcxproj
+++ b/build/libass/libass.vcxproj
@@ -23,7 +23,7 @@
       <AdditionalIncludeDirectories>
         $(LibassSrcDir)\libass;
         $(MSBuildThisFileDirectory);
-        $(AegisubSourceBase)\include\fribidi;
+        $(FribidiSrcDir)\fribidi;
         %(AdditionalIncludeDirectories)
       </AdditionalIncludeDirectories>
       <PreprocessorDefinitions>
@@ -108,4 +108,4 @@
       <Project>{fb8e8d19-a4d6-4181-943c-282075f49b41}</Project>
     </ProjectReference>
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>