diff --git a/implementations/C/joy.c b/implementations/C/joy.c
index 76be4d1..32b70f1 100644
--- a/implementations/C/joy.c
+++ b/implementations/C/joy.c
@@ -17,6 +17,7 @@ struct JoyType {
 		int boolean;
 		mpz_t i;
 		struct list_node* el;
+		char *symbol;
 	} value;
 } name ;