diff --git a/exercises/04/vslc/include/ir.h b/exercises/04/vslc/include/ir.h
index aa8d1ef..32a7907 100644
--- a/exercises/04/vslc/include/ir.h
+++ b/exercises/04/vslc/include/ir.h
@@ -20,11 +20,18 @@ typedef struct n {
  * @return Pointer to the initialized node
  * */
 node_t* node_init (
-    node_t *nd, node_index_t type, void *data, uint64_t n_children, ...
+    node_t*         nd, 
+    node_index_t    type, 
+    void*           data, 
+    uint64_t        n_children, 
+    ...
 );
 
 typedef enum {
-    SYM_GLOBAL_VAR, SYM_FUNCTION, SYM_PARAMETER, SYM_LOCAL_VAR
+    SYM_GLOBAL_VAR, 
+    SYM_FUNCTION, 
+    SYM_PARAMETER, 
+    SYM_LOCAL_VAR
 } symtype_t;
 
 typedef struct s {