diff --git a/speechd-braille.el b/speechd-braille.el
index a79b24e..dfbae4b 100644
--- a/speechd-braille.el
+++ b/speechd-braille.el
@@ -116,9 +116,14 @@
 
 (defclass speechd-braille-emu-driver (speechd-driver)
   ((name :initform 'braille-emu)
-   (manager :initform (lambda () (speechd-braille--create-manager
-                                  #'speechd-braille--display)))
-   (priority :initform (lambda () speechd-default-text-priority))))
+  (manager)
+  (priority)))
+
+(defmethod initialize-instance :after
+    ((this speechd-braille-emu-driver) slots)
+  (progn
+    (oset this priority speechd-default-text-priority)
+    (oset this manager (speechd-braille--create-manager #'speechd-braille--display))))
 
 (defmethod speechd-braille--make-message
     ((driver speechd-braille-emu-driver) text cursor)
diff --git a/speechd-brltty.el b/speechd-brltty.el
index f6bf353..ec89d04 100644
--- a/speechd-brltty.el
+++ b/speechd-brltty.el
@@ -237,10 +237,14 @@ is not recommended to assign or call user commands here."
 
 (defclass speechd-brltty-driver (speechd-braille-emu-driver)
   ((name :initform 'brltty)
-   (manager :initform (lambda () (speechd-brltty--create-manager)))
+   (manager)
    (brltty-connection :initform 'uninitialized)
    (brltty-last-try-time :initform 0)))
 
+(defmethod initialize-instance :after
+    ((this speechd-brltty-driver) slots)
+  (oset this manager (speechd-brltty--create-manager)))
+
 (defmethod speechd-braille--make-message
     ((driver speechd-brltty-driver) text message)
   (list (speechd-brltty--connection driver) text message))
diff --git a/speechd-out.el b/speechd-out.el
index aa82f10..0a484e3 100644
--- a/speechd-out.el
+++ b/speechd-out.el
@@ -87,9 +87,14 @@
 
 
 (defclass speechd-driver ()
-  ((name :initform (error "Driver name not given") :initarg :name
+  ((name :initarg :name
          :reader speechd-driver.name)))
 
+(defmethod initialize-instance :after
+    ((this speechd-driver) slots)
+  (if (not (slot-boundp this 'name))
+    (error "Driver name not given")))
+
 (defun speechd-out-register-driver (driver)
   (let ((class (class-of driver)))
     (labels ((replace (list)