diff --git a/src/tree_schema_helpers.c b/src/tree_schema_helpers.c
index bedf795..fc32f53 100644
--- a/src/tree_schema_helpers.c
+++ b/src/tree_schema_helpers.c
@@ -1730,3 +1730,47 @@
 
     return 1;
 }
+
+API LY_ERR
+lysc_set_private(const struct lysc_node *node, void *priv, void **prev)
+{
+    struct lysc_action *act;
+    struct lysc_notif *notif;
+
+    LY_CHECK_ARG_RET(NULL, node, LY_EINVAL);
+
+    switch (node->nodetype) {
+    case LYS_CONTAINER:
+    case LYS_CHOICE:
+    case LYS_CASE:
+    case LYS_LEAF:
+    case LYS_LEAFLIST:
+    case LYS_LIST:
+    case LYS_ANYXML:
+    case LYS_ANYDATA:
+        if (prev) {
+            *prev = node->priv;
+        }
+        ((struct lysc_node *)node)->priv = priv;
+        break;
+    case LYS_RPC:
+    case LYS_ACTION:
+        act = (struct lysc_action *)node;
+        if (prev) {
+            *prev = act->priv;
+        }
+        act->priv = priv;
+        break;
+    case LYS_NOTIF:
+        notif = (struct lysc_notif *)node;
+        if (prev) {
+            *prev = notif->priv;
+        }
+        notif->priv = priv;
+        break;
+    default:
+        return LY_EINVAL;
+    }
+
+    return LY_SUCCESS;
+}