diff --git a/lib/parse.c b/lib/parse.c
index 8ea8542..440ef8f 100644
--- a/lib/parse.c
+++ b/lib/parse.c
@@ -1292,15 +1292,20 @@ ipset_parse_timeout(struct ipset_session *session,
 		    enum ipset_opt opt, const char *str)
 {
 	int err;
-	unsigned long long num = 0;
+	unsigned long long llnum = 0;
+	uint32_t num = 0;
 
 	assert(session);
 	assert(opt == IPSET_OPT_TIMEOUT);
 	assert(str);
 
-	err = string_to_number_ll(session, str, 0, UINT_MAX/1000, &num);
-	if (err == 0)
+	err = string_to_number_ll(session, str, 0, UINT_MAX/1000, &llnum);
+	if (err == 0) {
+		/* Timeout is expected to be 32bits wide, so we have
+		   to convert it here */
+		num = llnum;
 		return ipset_session_data_set(session, opt, &num);
+	}
 
 	return err;
 }