diff --git a/src/honeysql/format.clj b/src/honeysql/format.clj
index ded5eff..bd16e97 100644
--- a/src/honeysql/format.clj
+++ b/src/honeysql/format.clj
@@ -276,6 +276,16 @@
                    (apply fn-handler fn-name (.args x)))))
   SqlRaw
   (-to-sql [x] (.s x))
+  SqlParam
+  (-to-sql [x] (let [pname (param-name x)
+                     x (if (map? @*input-params*)
+                         (get @*input-params* pname)
+                         (let [x (first @*input-params*)]
+                           (swap! *input-params* rest)
+                           x))]
+                 (swap! *param-names* conj pname)
+                 (swap! *params* conj x)
+                 "?"))
   clojure.lang.IPersistentMap
   (-to-sql [x] (let [clause-ops (sort-clauses (keys x))
                      sql-str (binding [*subquery?* true
@@ -289,15 +299,8 @@
   nil
   (-to-sql [x] "NULL")
   Object
-  (-to-sql [x] (let [[x pname] (if (instance? SqlParam x)
-                                 (let [pname (param-name x)]
-                                   (if (map? @*input-params*)
-                                     [(get @*input-params* pname) pname]
-                                     (let [x (first @*input-params*)]
-                                       (swap! *input-params* rest)
-                                       [x pname])))
-                                 ;; Anonymous param name -- :_1, :_2, etc.
-                                 [x (keyword (str "_" (swap! *param-counter* inc)))])]
+  ;; Anonymous param name -- :_1, :_2, etc.
+  (-to-sql [x] (let [pname (keyword (str "_" (swap! *param-counter* inc)))]
                  (swap! *param-names* conj pname)
                  (swap! *params* conj x)
                  "?")))
diff --git a/src/honeysql/types.clj b/src/honeysql/types.clj
index 8ab36f0..ffa6ccc 100644
--- a/src/honeysql/types.clj
+++ b/src/honeysql/types.clj
@@ -1,78 +1,42 @@
 (ns honeysql.types)
 
-(deftype SqlCall [name args _meta]
-  Object
-  (hashCode [this] (hash-combine (hash name) (hash args)))
-  (equals [this x]
-    (cond (identical? this x) true
-          (instance? SqlCall x) (and (= (.name this) (.name x))
-                                     (= (.args this) (.args x)))
-          :else false))
-  clojure.lang.IObj
-  (meta [this] _meta)
-  (withMeta [this m] (SqlCall. (.name this) (.args this) m)))
+(defrecord SqlCall [name args])
 
 (defn call
   "Represents a SQL function call. Name should be a keyword."
   [name & args]
-  (SqlCall. name args nil))
-
-(defn read-sql-call [form]
-  (apply call form))
-
-(defmethod print-method SqlCall [^SqlCall o ^java.io.Writer w]
-  (.write w (str "#sql/call " (pr-str (into [(.name o)] (.args o))))))
-
-(defmethod print-dup SqlCall [o w]
-  (print-method o w))
+  (SqlCall. name args))
 
 ;;;;
 
-(deftype SqlRaw [s _meta]
-  Object
-  (hashCode [this] (hash-combine (hash (class this)) (hash s)))
-  (equals [this x] (and (instance? SqlRaw x) (= (.s this) (.s x))))
-  clojure.lang.IObj
-  (meta [this] _meta)
-  (withMeta [this m] (SqlRaw. (.s this) m)))
+(defrecord SqlRaw [s])
 
 (defn raw
   "Represents a raw SQL string"
   [s]
-  (SqlRaw. (str s) nil))
-
-(defn read-sql-raw [form]
-  (raw form))
-
-(defmethod print-method SqlRaw [^SqlRaw o ^java.io.Writer w]
-  (.write w (str "#sql/raw " (pr-str (.s o)))))
-
-(defmethod print-dup SqlRaw [o w]
-  (print-method o w))
+  (SqlRaw. (str s)))
 
 ;;;;
 
-(deftype SqlParam [name _meta]
-  Object
-  (hashCode [this] (hash-combine (hash (class this)) (hash (name name))))
-  (equals [this x] (and (instance? SqlParam x) (= (.name this) (.name x))))
-  clojure.lang.IObj
-  (meta [this] _meta)
-  (withMeta [this m] (SqlParam. (.name this) m)))
+(defrecord SqlParam [name])
 
 (defn param
   "Represents a SQL parameter which can be filled in later"
   [name]
-  (SqlParam. name nil))
+  (SqlParam. name))
 
 (defn param-name [^SqlParam param]
   (.name param))
 
+;;;;
+
+;; retain readers for backwards compatibility
+
+(defn read-sql-call [form]
+  (apply call form))
+
+(defn read-sql-raw [form]
+  (raw form))
+
 (defn read-sql-param [form]
   (param form))
-
-(defmethod print-method SqlParam [^SqlParam o ^java.io.Writer w]
-  (.write w (str "#sql/param " (pr-str (.name o)))))
-
-(defmethod print-dup SqlParam [o w]
-  (print-method o w))