diff --git a/configure.ac b/configure.ac
index ae7b0b5b3..fd55c42cf 100644
--- a/configure.ac
+++ b/configure.ac
@@ -437,6 +437,7 @@ test/shape/data/text-rendering-tests/Makefile
 test/subset/Makefile
 test/subset/data/Makefile
 test/subset/data/repack_tests/Makefile
+test/threads/Makefile
 perf/Makefile
 docs/Makefile
 docs/version.xml