diff --git a/ocaml/build.ninja b/ocaml/build.ninja
index ac0cff6..358ee54 100644
--- a/ocaml/build.ninja
+++ b/ocaml/build.ninja
@@ -66,7 +66,7 @@ build always: phony | ezfio.ml
 build $GENERATED_NINJA: run_ninja_ocaml | always 
 build ezfio.ml: copy ../EZFIO/Ocaml/ezfio.ml
 build Qptypes.ml: create_qptypes qptypes_generator
-build qptypes_generator: run_ninja | $GENERATED_NINJA 
+build qptypes_generator: run_ninja | $GENERATED_NINJA  ezfio.ml
   target = qptypes_generator
 
 build clean: run_clean