diff --git a/src/tree_schema_internal.h b/src/tree_schema_internal.h
index a62f273..9fe27cd 100644
--- a/src/tree_schema_internal.h
+++ b/src/tree_schema_internal.h
@@ -694,6 +694,14 @@
 void lysp_node_free(struct ly_ctx *ctx, struct lysp_node *node);
 
 /**
+ * @brief Free a compiled pattern.
+ *
+ * @param[in] ctx libyang context.
+ * @param[in] pattern Pointer to the pattern to free.
+ */
+void lysc_pattern_free(struct ly_ctx *ctx, struct lysc_pattern **pattern);
+
+/**
  * @brief Free a bit/enum item.
  *
  * @param[in] ctx libyang context.