diff --git a/src/dune b/src/dune
index 267586e1..4d6e7e5d 100644
--- a/src/dune
+++ b/src/dune
@@ -23,6 +23,7 @@
   mirage-crypto-rng
   mirage-crypto-rng-mkernel
   mirage-ptime.solo5
+  mfat
   ;
   b32
   ;