libyang DOC spelling correction in headers
diff --git a/src/validation.h b/src/validation.h
index aad751e..4135447 100644
--- a/src/validation.h
+++ b/src/validation.h
@@ -58,7 +58,7 @@
* @param[in] node_when Set with nodes with "when" conditions, can be NULL.
* @param[in] node_exts Set with nodes with extension instances with validation plugin callback, can be NULL.
* @param[in] node_types Set with nodes with unresolved types, can be NULL
- * @param[in] meta_types Set with metdata with unresolved types, can be NULL.
+ * @param[in] meta_types Set with metadata with unresolved types, can be NULL.
* @param[in,out] diff Validation diff.
* @return LY_ERR value.
*/