diff --git a/CHANGELOG.md b/CHANGELOG.md
index f18ed8645..c631bd58d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@
 - relay: add infos "relay_api_version" and "relay_api_version_number"
 - core: add hdata count in evaluation of expressions with `hdata_count:name[list]` or `hdata_count:name[pointer]`
 - core: add completion "bars_items"
+- api: send new signal "buffer_line_data_changed" when a line is updated in a buffer via hdata
 - api: add hashtable type "longlong"
 - api: add function line_search_by_id
 - doc: add doc on "api" relay
diff --git a/doc/en/weechat_plugin_api.en.adoc b/doc/en/weechat_plugin_api.en.adoc
index 294c457d2..ba2a64a2e 100644
--- a/doc/en/weechat_plugin_api.en.adoc
+++ b/doc/en/weechat_plugin_api.en.adoc
@@ -12116,6 +12116,10 @@ List of signals sent by WeeChat and plugins:
 | Pointer: line.
 | Line added in a buffer.
 
+| weechat | [[hook_signal_buffer_line_data_changed]] buffer_line_data_changed | 4.4.0
+| Pointer: line data.
+| Line data has been updated in a buffer.
+
 | weechat | [[hook_signal_buffer_lines_hidden]] buffer_lines_hidden |
 | Pointer: buffer.
 | Lines hidden in buffer.
diff --git a/doc/fr/weechat_plugin_api.fr.adoc b/doc/fr/weechat_plugin_api.fr.adoc
index 8a3e74cbf..9e225d1e5 100644
--- a/doc/fr/weechat_plugin_api.fr.adoc
+++ b/doc/fr/weechat_plugin_api.fr.adoc
@@ -12367,6 +12367,10 @@ Liste des signaux envoyés par WeeChat et les extensions :
 | Pointeur : ligne.
 | Ligne ajoutée dans un tampon.
 
+| weechat | [[hook_signal_buffer_line_data_changed]] buffer_line_data_changed | 4.4.0
+| Pointeur : données de la ligne.
+| Les données de la ligne ont changé dans un tampon.
+
 | weechat | [[hook_signal_buffer_lines_hidden]] buffer_lines_hidden |
 | Pointeur : tampon.
 | Lignes cachées dans le tampon.
diff --git a/doc/it/weechat_plugin_api.it.adoc b/doc/it/weechat_plugin_api.it.adoc
index f74983840..cfd7ad09e 100644
--- a/doc/it/weechat_plugin_api.it.adoc
+++ b/doc/it/weechat_plugin_api.it.adoc
@@ -12618,6 +12618,11 @@ List of signals sent by WeeChat and plugins:
 | Puntatore: riga.
 | Riga aggiunta in un buffer.
 
+// TRANSLATION MISSING
+| weechat | [[hook_signal_buffer_line_data_changed]] buffer_line_data_changed | 4.4.0
+| Pointer: line data.
+| Line data has been updated in a buffer.
+
 | weechat | [[hook_signal_buffer_lines_hidden]] buffer_lines_hidden |
 | Puntatore: buffer.
 | Righe nascoste nel buffer.
diff --git a/doc/ja/weechat_plugin_api.ja.adoc b/doc/ja/weechat_plugin_api.ja.adoc
index 2932be359..ee11bce3d 100644
--- a/doc/ja/weechat_plugin_api.ja.adoc
+++ b/doc/ja/weechat_plugin_api.ja.adoc
@@ -12281,6 +12281,11 @@ WeeChat とプラグインが送信するシグナルのリスト:
 | Pointer: 行
 | バッファに行を追加
 
+// TRANSLATION MISSING
+| weechat | [[hook_signal_buffer_line_data_changed]] buffer_line_data_changed | 4.4.0
+| Pointer: line data.
+| Line data has been updated in a buffer.
+
 | weechat | [[hook_signal_buffer_lines_hidden]] buffer_lines_hidden |
 | Pointer: バッファ
 | バッファから行を隠す
diff --git a/doc/sr/weechat_plugin_api.sr.adoc b/doc/sr/weechat_plugin_api.sr.adoc
index a1f6a7810..abf3e029a 100644
--- a/doc/sr/weechat_plugin_api.sr.adoc
+++ b/doc/sr/weechat_plugin_api.sr.adoc
@@ -11792,6 +11792,11 @@ struct t_hook *weechat_hook_signal (const char *signal,
 | Показивач: линија.
 | У бафер је додата линија.
 
+// TRANSLATION MISSING
+| weechat | [[hook_signal_buffer_line_data_changed]] buffer_line_data_changed | 4.4.0
+| Pointer: line data.
+| Line data has been updated in a buffer.
+
 | weechat | [[hook_signal_buffer_lines_hidden]] buffer_lines_hidden |
 | Показивач: бафер.
 | У баферу су сакривене линије.
diff --git a/src/gui/gui-line.c b/src/gui/gui-line.c
index c5d5fa3e8..b25b853b6 100644
--- a/src/gui/gui-line.c
+++ b/src/gui/gui-line.c
@@ -2396,6 +2396,9 @@ gui_line_hdata_line_data_update_cb (void *data,
         }
         gui_filter_buffer (line_data->buffer, line_data);
         gui_buffer_ask_chat_refresh (line_data->buffer, 1);
+        (void) gui_buffer_send_signal (line_data->buffer,
+                                       "buffer_line_data_changed",
+                                       WEECHAT_HOOK_SIGNAL_POINTER, line_data);
     }
 
     return rc;