diff --git a/aegisub/build/fftw/fftw.vcxproj b/aegisub/build/fftw/fftw.vcxproj
index bb6f108a8..88f32115f 100644
--- a/aegisub/build/fftw/fftw.vcxproj
+++ b/aegisub/build/fftw/fftw.vcxproj
@@ -48,7 +48,9 @@
$(FftwSrcDir)\rdft\scalar;
$(FftwSrcDir)\reodft;
$(FftwSrcDir)\simd-support;
- $(FftwSrcDir)\threads
+ $(FftwSrcDir)\threads;
+ $(MSBuildThisFileDirectory);
+ %(AdditionalIncludeDirectories)
StreamingSIMDExtensions2
true