diff --git a/src/spec_tools/parse.cljc b/src/spec_tools/parse.cljc
index 9c253fa8..dfb7d866 100644
--- a/src/spec_tools/parse.cljc
+++ b/src/spec_tools/parse.cljc
@@ -193,8 +193,7 @@
      ::items specs}))
 
 (defmethod parse-form 'clojure.spec.alpha/merge [_ form options]
-  (let [type-priority #((:type %) {:map 0
-                                   :multi-spec 1} 0)]
+  (let [type-priority #(if (= (:type %) :multi-spec) 1 0)]
     (apply impl/deep-merge (->> (rest form)
                                 (map #(parse-spec % options))
                                 (sort-by type-priority)))))
diff --git a/test/cljc/spec_tools/core_test.cljc b/test/cljc/spec_tools/core_test.cljc
index 96d27f68..b1bf46df 100644
--- a/test/cljc/spec_tools/core_test.cljc
+++ b/test/cljc/spec_tools/core_test.cljc
@@ -840,6 +840,20 @@
        (is (st/spec? (st/merge ::qix ::qux)))
        (is (st/spec? (st/merge qix ::qux))))))
 
+(s/def ::a242 int?)
+(s/def ::b242 int?)
+(s/def ::c242 int?)
+
+(deftest issue-242
+  (testing "parse-form should continue to work with [:or [:map]] specs"
+    (let [desired-spec (st/spec (s/merge (s/or :one (s/keys :req-un [::a242])
+                                               :two (s/keys :req-un [::b242]))
+                                         (s/keys :req-un [::c242])))]
+      (is (s/valid? desired-spec {:a242 1 :c242 2}))
+      (is (not (s/valid? desired-spec {:c242 2})))
+      (is (s/valid? desired-spec {:b242 2 :c242 3}))
+      (is (not (s/valid? desired-spec {:a242 1}))))))
+
 (s/def ::rec-pattern (s/coll-of (s/or :atr qualified-keyword?
                                       :ref (s/map-of qualified-keyword?
                                                      (s/or :rec-pattern ::rec-pattern)))))