diff --git a/src/printer_data.h b/src/printer_data.h
index 09fe8f5..3eb4fec 100644
--- a/src/printer_data.h
+++ b/src/printer_data.h
@@ -133,7 +133,7 @@
  * @return LY_ERR value.
  */
 LY_ERR lyd_print_clb(ssize_t (*writeclb)(void *arg, const void *buf, size_t count), void *arg,
-                     const struct lyd_node *root, LYD_FORMAT format, int options);
+        const struct lyd_node *root, LYD_FORMAT format, int options);
 
 #ifdef __cplusplus
 }