diff --git a/lib/dune b/lib/dune
index 68c816f..27c6bd3 100644
--- a/lib/dune
+++ b/lib/dune
@@ -1,4 +1,4 @@
 (library
  (name OSCADml)
  (public_name OSCADml)
- (libraries OCADml cairo2))
+ (libraries OCADml cairo2 unix))