diff --git a/php/servers/sources.php b/php/servers/sources.php
index 2b0d294..6a482cf 100644
--- a/php/servers/sources.php
+++ b/php/servers/sources.php
@@ -99,11 +99,15 @@
 				}
 
 				$url = $room_entry['url'];
-				$tags = $room_entry['tags'];
+				$tag_string = $room_entry['tags'];
+				$nsfw = isset($room_entry['nsfw']) && $room_entry['nsfw'] == "1";
 
 				$room_id = url_get_room_id($url);
 
-				$this->tags[$room_id] = explode(',', $tags);
+				$this->tags[$room_id] = explode(',', $tag_string);
+				if ($nsfw) {
+					$this->tags[$room_id] = array_unique(["nsfw", ...$this->tags[$room_id]]);
+				}
 			}
 
 			SDIRCommunitySource::sdir_report_errors($entry_missing_url, $entry_missing_tags);