diff --git a/inc/functions.php b/inc/functions.php
index 5457cc5f..895a3adb 100644
--- a/inc/functions.php
+++ b/inc/functions.php
@@ -1691,7 +1691,7 @@ function buildIndex($global_api = "yes") {
 				break;
 
 			if ($config['cache']['enabled']) {
-				$contentHash = md5(json_encode($content['threads']));
+				$contentHash = md5(json_encode($content['body']));
 				$cacheHit = cache::get('index_cache'. $contentHash);
 				if ($cacheHit)
 					continue;