diff --git a/client/html/help_search_posts.tpl b/client/html/help_search_posts.tpl
index efcb7c1a..0fe584fa 100644
--- a/client/html/help_search_posts.tpl
+++ b/client/html/help_search_posts.tpl
@@ -83,9 +83,17 @@
             <td>having given flag. <code>&lt;value&gt;</code> can be either <code>loop</code> or <code>sound</code>.</td>
         </tr>
         <tr>
-            <td><code>content-checksum</code></td>
+            <td><code>sha1</code></td>
             <td>having given SHA1 checksum</td>
         </tr>
+        <tr>
+            <td><code>md5</code></td>
+            <td>having given MD5 checksum</td>
+        </tr>
+        <tr>
+            <td><code>content-checksum</code></td>
+            <td>alias of <code>sha1</code></td>
+        </tr>
         <tr>
             <td><code>file-size</code></td>
             <td>having given file size (in bytes)</td>
diff --git a/server/szurubooru/search/configs/post_search_config.py b/server/szurubooru/search/configs/post_search_config.py
index fc98e550..ddc003b7 100644
--- a/server/szurubooru/search/configs/post_search_config.py
+++ b/server/szurubooru/search/configs/post_search_config.py
@@ -274,9 +274,13 @@ class PostSearchConfig(BaseSearchConfig):
                     ),
                 ),
                 (
-                    ["content-checksum"],
+                    ["content-checksum", "sha1"],
                     search_util.create_str_filter(model.Post.checksum),
                 ),
+                (
+                    ["md5"],
+                    search_util.create_str_filter(model.Post.checksum_md5),
+                ),
                 (
                     ["file-size"],
                     search_util.create_num_filter(model.Post.file_size),