diff --git a/subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json b/subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json
index 0e66d7b870..9332d2c104 100644
--- a/subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json
+++ b/subprojects/gst-plugins-bad/docs/plugins/gst_plugins_cache.json
@@ -510,7 +510,7 @@
                         "presence": "always"
                     },
                     "src": {
-                        "caps": "video/x-av1:\n",
+                        "caps": "video/x-av1:\n      alignment: tu\n",
                         "direction": "src",
                         "presence": "always"
                     }
diff --git a/subprojects/gst-plugins-bad/ext/aom/gstav1enc.c b/subprojects/gst-plugins-bad/ext/aom/gstav1enc.c
index f97b6ca7f1..a9f5718681 100644
--- a/subprojects/gst-plugins-bad/ext/aom/gstav1enc.c
+++ b/subprojects/gst-plugins-bad/ext/aom/gstav1enc.c
@@ -218,7 +218,7 @@ static GstStaticPadTemplate gst_av1_enc_src_pad_template =
 GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
-    GST_STATIC_CAPS ("video/x-av1")
+    GST_STATIC_CAPS ("video/x-av1, alignment = (string) tu")
     );
 
 static void