diff --git a/frontend/debug.c b/frontend/debug.c
index 821e37f..ee62f28 100644
--- a/frontend/debug.c
+++ b/frontend/debug.c
@@ -64,7 +64,7 @@ extern void print_lex_token(struct ivy_token *tok)
 		printf("(%s)", ivy_keyword_to_string(tok->t_keyword));
 		break;
 	case IVY_TOK_INT:
-		printf("(%llu)", tok->t_int);
+		printf("(%lld)", tok->t_int);
 		break;
 	case IVY_TOK_DOUBLE:
 		printf("(%lf)", tok->t_double);