diff --git a/src/dune b/src/dune
index 4d6e7e5d..e44363fe 100644
--- a/src/dune
+++ b/src/dune
@@ -22,6 +22,7 @@
   mirage-crypto
   mirage-crypto-rng
   mirage-crypto-rng-mkernel
+  mirage-mtime.solo5
   mirage-ptime.solo5
   mfat
   ;