diff --git a/notes.org b/notes.org
index fff5876..e224aca 100644
--- a/notes.org
+++ b/notes.org
@@ -482,6 +482,20 @@ Not sure if clearing the cache is necessary here, because it seemed to make near
 | preamble: (deadline <= "2019-01-01")    | 27.91              |      0.014606 |        0 |                0 |
 | no preamble: (deadline <= "2019-01-01") | slowest            |      0.407682 |        0 |                0 |
 
+*** =habit=
+
+#+BEGIN_SRC elisp
+  (org-ql-preamble-bench :times 1
+                         :file "~/org/inbox.org"
+                         :query (habit))
+#+END_SRC
+
+#+RESULTS:
+| Form                 | x faster than next | Total runtime | # of GCs | Total GC runtime |
+|----------------------+--------------------+---------------+----------+------------------|
+| preamble: (habit)    | 70.09              |      0.016489 |        0 |                0 |
+| no preamble: (habit) | slowest            |      1.155649 |        0 |                0 |
+
 *** =level=
 
 #+BEGIN_SRC elisp
diff --git a/org-ql.el b/org-ql.el
index b66f0a3..24d6d2c 100644
--- a/org-ql.el
+++ b/org-ql.el
@@ -348,6 +348,10 @@ replace the clause with a preamble."
                                                      t))
                                  ;; Return nil, don't test the predicate.
                                  nil)
+                                (`(habit)
+                                 (setq org-ql-preamble (rx-to-string `(seq bol (0+ space) ":STYLE:" (1+ space)
+                                                                           "habit" (0+ space) eol)))
+                                 nil)
                                 (`(level ,comparator-or-num ,num)
                                  (let ((repeat (pcase comparator-or-num
                                                  ('< `(repeat 1 ,(1- num) "*"))