diff --git a/autobuild/build.sh b/autobuild/build.sh
index 1eac9c6..ebdf1ce 100755
--- a/autobuild/build.sh
+++ b/autobuild/build.sh
@@ -80,6 +80,7 @@ if [[ `uname` == "Darwin" ]]; then
 	export PATH="/usr/local/opt/ccache/libexec:/usr/local/opt/gettext/bin:${PATH}"
 	export LDFLAGS="-L/usr/local/opt/gettext/lib ${LDFLAGS}"
 	export CPPFLAGS="-I/usr/local/opt/gettext/include ${CPPFLAGS}"
+	export PKG_CONFIG_PATH="/usr/local/opt/libffi/lib/pkgconfig:${PKG_CONFIG_PATH}"
 
 	# Force use system perl, see https://github.com/synfig/synfig/issues/794
 	cat > ${PREFIX}/bin/perl <<EOF