diff --git a/org-ql-search.el b/org-ql-search.el
index dc7c130..fef91c9 100644
--- a/org-ql-search.el
+++ b/org-ql-search.el
@@ -99,6 +99,11 @@ directories, etc, which would make it slow to list the
 `org-directory' files recursively."
   :type 'boolean)
 
+(defcustom org-ql-search-buffer-major-modes '(org-mode)
+  "Search not only in buffers with `org-mode' set as major mode.
+E.g. `org-journal-mode' can be enabled as well."
+  :type '(repeat symbol))
+
 ;;;; Commands
 
 ;;;###autoload
diff --git a/org-ql-view.el b/org-ql-view.el
index 8d65582..7c2b18e 100644
--- a/org-ql-view.el
+++ b/org-ql-view.el
@@ -1147,7 +1147,8 @@ current buffer.  Otherwise BUFFERS-FILES is returned unchanged."
   "Return BUFFERS-FILES expanded to a list of files or buffers.
 The counterpart to `org-ql-view--contract-buffers-files'."
   (pcase-exhaustive buffers-files
-    ("all" (--select (equal (buffer-local-value 'major-mode it) 'org-mode)
+    ("all" (--select (member (buffer-local-value 'major-mode it)
+			     org-ql-search-buffer-major-modes)
                      (buffer-list)))
     ("org-agenda-files" (org-agenda-files))
     ("org-directory" (org-ql-search-directories-files))