--- a/parse.y
+++ b/parse.y
@@ -106,7 +106,7 @@
 
 numberstring	: NUMBER				{
 			char	*s;
-			if (asprintf(&s, "%lld", $1) == -1) {
+			if (asprintf(&s, "%lld", (long long)$1) == -1) {
 				yyerror("string: asprintf");
 				YYERROR;
 			}