diff --git a/src/main.h b/src/main.h
index ccb6afc..a8d45f7 100644
--- a/src/main.h
+++ b/src/main.h
@@ -212,7 +212,7 @@ mxml_node_t* generate_index() {
 	for (; !iterator_equals(&count_it, &peroid_end); iterator_increment(&count_it)) {
 		struct StatusPeroid* peroid = *(struct StatusPeroid**)iterator_get(&count_it);
 		if (earliest_time == 0) earliest_time = peroid->time;
-		else if (peroid->time <= (now - (long)retension * 1000000)) {
+		else if (peroid->time <= (now - (long)retention * 1000000)) {
 			earliest_time = peroid->time;
 		} else col_count++;
 	}