diff --git a/llvm/test/Bindings/OCaml/executionengine.ml b/llvm/test/Bindings/OCaml/executionengine.ml
--- a/llvm/test/Bindings/OCaml/executionengine.ml
+++ b/llvm/test/Bindings/OCaml/executionengine.ml
@@ -1,7 +1,7 @@
 (* RUN: rm -rf %t && mkdir -p %t && cp %s %t/executionengine.ml
- * RUN: %ocamlc -g -w +A -package llvm.executionengine -linkpkg %t/executionengine.ml -o %t/executable
+ * RUN: %ocamlc -g -w +A -thread -package llvm.executionengine -linkpkg %t/executionengine.ml -o %t/executable
  * RUN: %t/executable
- * RUN: %ocamlopt -g -w +A -package llvm.executionengine -linkpkg %t/executionengine.ml -o %t/executable
+ * RUN: %ocamlopt -g -w +A -thread -package llvm.executionengine -linkpkg %t/executionengine.ml -o %t/executable
  * RUN: %t/executable
  * REQUIRES: native
  * XFAIL: vg_leak