diff --git a/configure.ac b/configure.ac
index 4f55aad..a93f701 100644
--- a/configure.ac
+++ b/configure.ac
@@ -807,6 +807,7 @@
   lib/rb/Makefile
   lib/rs/Makefile
   lib/rs/test/Makefile
+  lib/rs/test/fuzz/Makefile
   lib/rs/test_recursive/Makefile
   lib/rs/test_recursive/src/Makefile
   lib/rs/test_recursive/src/maintenance/Makefile