diff --git a/common_lisp/step2_eval.lisp b/common_lisp/step2_eval.lisp
index 4c3a63a6..8a4e41dc 100644
--- a/common_lisp/step2_eval.lisp
+++ b/common_lisp/step2_eval.lisp
@@ -14,27 +14,27 @@
 
 (setf (gethash (types:make-mal-symbol '+) *repl-env*)
       (types:make-mal-builtin-fn (lambda (value1 value2)
-                             (types:make-mal-number (apply-unwrapped-values '+
-                                                                            value1
-                                                                            value2)))))
+                                   (apply-unwrapped-values '+
+                                                           value1
+                                                           value2))))
 
 (setf (gethash (types:make-mal-symbol '-) *repl-env*)
       (types:make-mal-builtin-fn (lambda (value1 value2)
-                                   (types:make-mal-number (apply-unwrapped-values '-
-                                                                                  value1
-                                                                                  value2)))))
+                                   (apply-unwrapped-values '-
+                                                           value1
+                                                           value2))))
 
 (setf (gethash (types:make-mal-symbol '*) *repl-env*)
       (types:make-mal-builtin-fn (lambda (value1 value2)
-                                   (types:make-mal-number (apply-unwrapped-values '*
-                                                                                  value1
-                                                                                  value2)))))
+                                   (apply-unwrapped-values '*
+                                                           value1
+                                                           value2))))
 
 (setf (gethash (types:make-mal-symbol '/) *repl-env*)
       (types:make-mal-builtin-fn (lambda (value1 value2)
-                                   (types:make-mal-number (apply-unwrapped-values '/
-                                                                                  value1
-                                                                                  value2)))))
+                                   (apply-unwrapped-values '/
+                                                           value1
+                                                           value2))))
 
 (defun lookup-env (symbol env)
   (let ((value (gethash symbol env)))
diff --git a/common_lisp/types.lisp b/common_lisp/types.lisp
index b97ae8ca..faa39823 100644
--- a/common_lisp/types.lisp
+++ b/common_lisp/types.lisp
@@ -97,4 +97,15 @@
                  forms))))
 
 (defun apply-unwrapped-values (op &rest values)
-  (apply op (mapcar #'mal-value values)))
+  (let ((value (apply op (mapcar #'mal-value values))))
+    (funcall (typecase value
+               (number #'make-mal-number)
+               (symbol #'make-mal-number)
+               (keyword #'make-mal-keyword)
+               (string #'make-mal-string)
+               (boolean #'make-mal-boolean)
+               (list #'make-mal-list)
+               (vector #'make-mal-vector)
+               (hash-map #'make-mal-hash-map)
+               (null #'make-mal-nil))
+             value)))