diff --git a/doc/pluginsignals.c b/doc/pluginsignals.c
index 7cd38ce543..ca50912ed1 100644
--- a/doc/pluginsignals.c
+++ b/doc/pluginsignals.c
@@ -92,6 +92,17 @@ signal void (*document_reload)(GObject *obj, GeanyDocument *doc, gpointer user_d
  */
 signal void (*document_before_save)(GObject *obj, GeanyDocument *doc, gpointer user_data);
 
+/** Sent before save as is performed with the original document.
+ *
+ * @param obj a GeanyObject instance, should be ignored.
+ * @param doc the original document. The document with the new file name is still
+ *        reported by the "document-save" signal sent afterwards.
+ * @param user_data user data.
+ *
+ * @since 2.1
+ */
+signal void (*document_before_save_as)(GObject *obj, GeanyDocument *doc, gpointer user_data);
+
 /** Sent when a new document is saved.
  *
  * @param obj a GeanyObject instance, should be ignored.
diff --git a/src/document.c b/src/document.c
index 4cf74105b1..d03a88ea31 100644
--- a/src/document.c
+++ b/src/document.c
@@ -1836,6 +1836,8 @@ gboolean document_save_file_as(GeanyDocument *doc, const gchar *utf8_fname)
 
 	g_return_val_if_fail(doc != NULL, FALSE);
 
+	g_signal_emit_by_name(geany_object, "document-before-save-as", doc);
+
 	new_file = document_need_save_as(doc) || (utf8_fname != NULL && strcmp(doc->file_name, utf8_fname) != 0);
 	if (utf8_fname != NULL)
 		SETPTR(doc->file_name, g_strdup(utf8_fname));
diff --git a/src/geanyobject.c b/src/geanyobject.c
index 47999c09d5..0b3d996903 100644
--- a/src/geanyobject.c
+++ b/src/geanyobject.c
@@ -105,6 +105,13 @@ static void create_signals(GObjectClass *g_object_class)
 		0, NULL, NULL, g_cclosure_marshal_VOID__BOXED,
 		G_TYPE_NONE, 1,
 		GEANY_TYPE_DOCUMENT);
+	geany_object_signals[GCB_DOCUMENT_BEFORE_SAVE_AS] = g_signal_new (
+		"document-before-save-as",
+		G_OBJECT_CLASS_TYPE (g_object_class),
+		G_SIGNAL_RUN_FIRST,
+		0, NULL, NULL, g_cclosure_marshal_VOID__BOXED,
+		G_TYPE_NONE, 1,
+		GEANY_TYPE_DOCUMENT);
 	geany_object_signals[GCB_DOCUMENT_SAVE] = g_signal_new (
 		"document-save",
 		G_OBJECT_CLASS_TYPE (g_object_class),
diff --git a/src/geanyobject.h b/src/geanyobject.h
index e6cb988044..62d3524090 100644
--- a/src/geanyobject.h
+++ b/src/geanyobject.h
@@ -57,6 +57,7 @@ typedef enum
 	GCB_SAVE_SETTINGS,
 	GCB_LOAD_SETTINGS,
 	GCB_KEY_PRESS_NOTIFY,
+	GCB_DOCUMENT_BEFORE_SAVE_AS,
 	GCB_MAX
 }
 GeanyCallbackId;