diff --git a/client/html/help_search_posts.tpl b/client/html/help_search_posts.tpl
index 85dffce0..d1097b79 100644
--- a/client/html/help_search_posts.tpl
+++ b/client/html/help_search_posts.tpl
@@ -38,6 +38,10 @@
             <td><code>fav</code></td>
             <td>favorited by given user (accepts wildcards)</td>
         </tr>
+        <tr>
+            <td><code>source</code></td>
+            <td>having given source URL (accepts wildcards)</td>
+        </tr>
         <tr>
             <td><code>tag-count</code></td>
             <td>having given number of tags</td>
diff --git a/server/szurubooru/search/configs/post_search_config.py b/server/szurubooru/search/configs/post_search_config.py
index 3d5b0eea..a1628ecb 100644
--- a/server/szurubooru/search/configs/post_search_config.py
+++ b/server/szurubooru/search/configs/post_search_config.py
@@ -230,6 +230,11 @@ class PostSearchConfig(BaseSearchConfig):
                 _create_score_filter(-1)
             ),
 
+            (
+                ['source'],
+                search_util.create_str_filter(model.Post.source)
+            ),
+
             (
                 ['tag-count'],
                 search_util.create_num_filter(model.Post.tag_count)