diff --git a/ompi/mca/pml/ucx/pml_ucx.c b/ompi/mca/pml/ucx/pml_ucx.c
index 6ed7c487a7..d03a1ad4d2 100644
--- a/ompi/mca/pml/ucx/pml_ucx.c
+++ b/ompi/mca/pml/ucx/pml_ucx.c
@@ -447,7 +447,7 @@ int mca_pml_ucx_del_procs(struct ompi_proc_t **procs, size_t nprocs)
     mca_pml_ucx_waitall(dreqs, &num_reqs);
     free(dreqs);
 
-    opal_pmix.fence_nb(NULL, 0, mca_pml_fence_complete_cb, &fenced);
+    opal_pmix.fence_nb(NULL, 0, mca_pml_fence_complete_cb, (void*)&fenced);
     while (!fenced) {
         ucp_worker_progress(ompi_pml_ucx.ucp_worker);
     }