diff --git a/exercises/02/vslc/src/parser.y b/exercises/02/vslc/src/parser.y
index e29cbad..da2150b 100644
--- a/exercises/02/vslc/src/parser.y
+++ b/exercises/02/vslc/src/parser.y
@@ -237,13 +237,13 @@ expression:
       $$ = $2;
     }
   | number {
-      node_init($$ = malloc(sizeof(node_t)), EXPRESSION, NULL, 1, $1);
+      node_init($$ = malloc(sizeof(node_t)), EXPRESSION, /*NULL*/ strdup("number"), 1, $1);
     }
   | identifier {
-      node_init($$ = malloc(sizeof(node_t)), EXPRESSION, NULL, 1, $1);
+      node_init($$ = malloc(sizeof(node_t)), EXPRESSION, /*NULL*/ strdup("identifier"), 1, $1);
     }
   | identifier '(' argument_list ')' {
-      node_init($$ = malloc(sizeof(node_t)), EXPRESSION, NULL, 2, $1, $3);
+      node_init($$ = malloc(sizeof(node_t)), EXPRESSION, /*NULL*/ strdup("function_call"), 2, $1, $3);
     }
   ;