diff --git a/opal/mca/pmix/s1/pmix_s1.c b/opal/mca/pmix/s1/pmix_s1.c
index 5c097261fe..fc1d9a1a2b 100644
--- a/opal/mca/pmix/s1/pmix_s1.c
+++ b/opal/mca/pmix/s1/pmix_s1.c
@@ -585,6 +585,15 @@ static bool s1_get_attr(const char *attr, opal_value_t **kv)
         return true;
     }
 
+    if (0 == strcmp(PMIX_LOCAL_SIZE, attr)) {
+        kp = OBJ_NEW(opal_value_t);
+        kp->key = strdup(attr);
+        kp->type = OPAL_UINT32;
+        kp->data.uint32 = s1_nlranks;
+        *kv = kp;
+        return true;
+    }
+
     if (0 == strcmp(PMIX_APPNUM, attr)) {
         kp = OBJ_NEW(opal_value_t);
         kp->key = strdup(attr);
diff --git a/opal/mca/pmix/s2/pmix_s2.c b/opal/mca/pmix/s2/pmix_s2.c
index c224232997..bd41a8b642 100644
--- a/opal/mca/pmix/s2/pmix_s2.c
+++ b/opal/mca/pmix/s2/pmix_s2.c
@@ -565,6 +565,15 @@ static bool s2_get_attr(const char *attr, opal_value_t **kv)
         return true;
     }
 
+    if (0 == strcmp(PMIX_LOCAL_SIZE, attr)) {
+        kp = OBJ_NEW(opal_value_t);
+        kp->key = strdup(attr);
+        kp->type = OPAL_UINT32;
+        kp->data.uint32 = s2_nlranks;
+        *kv = kp;
+        return true;
+    }
+
     if (0 == strcmp(PMIX_APPNUM, attr)) {
         kp = OBJ_NEW(opal_value_t);
         kp->key = strdup(attr);