diff --git a/ompi/mca/pml/ucx/pml_ucx.c b/ompi/mca/pml/ucx/pml_ucx.c
index 74d80b3eaaa..9b0fdf495e0 100644
--- a/ompi/mca/pml/ucx/pml_ucx.c
+++ b/ompi/mca/pml/ucx/pml_ucx.c
@@ -128,6 +128,11 @@ int mca_pml_ucx_open(void)
         return OMPI_ERROR;
     }
 
+    params.field_mask      = UCP_PARAM_FIELD_FEATURES |
+                             UCP_PARAM_FIELD_REQUEST_SIZE |
+                             UCP_PARAM_FIELD_REQUEST_INIT |
+                             UCP_PARAM_FIELD_REQUEST_CLEANUP |
+                             UCP_PARAM_FIELD_TAG_SENDER_MASK;
     params.features        = UCP_FEATURE_TAG;
     params.request_size    = sizeof(ompi_request_t);
     params.request_init    = mca_pml_ucx_request_init;
diff --git a/oshmem/mca/spml/ucx/spml_ucx_component.c b/oshmem/mca/spml/ucx/spml_ucx_component.c
index 7491238850a..27536a17450 100644
--- a/oshmem/mca/spml/ucx/spml_ucx_component.c
+++ b/oshmem/mca/spml/ucx/spml_ucx_component.c
@@ -118,8 +118,8 @@ static int mca_spml_ucx_component_open(void)
     }
 
     memset(&params, 0, sizeof(params));
-    params.features = UCP_FEATURE_RMA|UCP_FEATURE_AMO32|UCP_FEATURE_AMO64;
-
+    params.field_mask = UCP_PARAM_FIELD_FEATURES;
+    params.features   = UCP_FEATURE_RMA|UCP_FEATURE_AMO32|UCP_FEATURE_AMO64;
     err = ucp_init(&params, ucp_config, &mca_spml_ucx.ucp_context);
     ucp_config_release(ucp_config);
     if (UCS_OK != err) {