diff --git a/parser/parser_yacc.y b/parser/parser_yacc.y
index 3e2bcd2..a6f12e5 100644
--- a/parser/parser_yacc.y
+++ b/parser/parser_yacc.y
@@ -902,6 +902,7 @@ rules: rules TOK_SET TOK_RLIMIT TOK_ID TOK_LE TOK_VALUE opt_id TOK_END_OF_RULE
 					pwarn(_("RLIMIT 'cpu' no units specified using default units of seconds\n"));
 				value = tmp;
 				break;
+#ifdef RLIMIT_RTTIME
 			case RLIMIT_RTTIME:
 				/* RTTIME is measured in microseconds */
 				if (!end || $6 == end || tmp < 0)
@@ -913,6 +914,7 @@ rules: rules TOK_SET TOK_RLIMIT TOK_ID TOK_LE TOK_VALUE opt_id TOK_END_OF_RULE
 					pwarn(_("RLIMIT 'rttime' no units specified using default units of microseconds\n"));
 				value = tmp;
 				break;
+#endif
 			case RLIMIT_NOFILE:
 			case RLIMIT_NPROC:
 			case RLIMIT_LOCKS:
-- 
2.11.2