diff --git a/brltty.el b/brltty.el
index 053c5c7..09a45b5 100644
--- a/brltty.el
+++ b/brltty.el
@@ -227,8 +227,10 @@ available, from the  environment variable CONTROLVT."
      (* 256 (aref string 2)) (aref string 3)))
 
 (defun brltty--read-integer64 (string)
-  (list (brltty--read-integer (substring string 0 4))
-        (brltty--read-integer (substring string 4 8))))
+  (list
+   (+ (* 256 (aref string 0)) (aref string 1))
+   (+ (* 256 256 (aref string 2)) (* 256 (aref string 3)) (aref string 4))
+   (+ (* 256 256 (aref string 5)) (* 256 (aref string 6)) (aref string 7))))
 
 (defun brltty--read-packet (connection)
   (condition-case err
diff --git a/speechd-brltty.el b/speechd-brltty.el
index a7106a6..bbd552f 100644
--- a/speechd-brltty.el
+++ b/speechd-brltty.el
@@ -38,27 +38,27 @@
 
 (defcustom speechd-braille-key-functions
   '((1 . speechd-brltty-previous-message)
-    ((0 536870913) . speechd-brltty-previous-message)
+    ((0 32 1) . speechd-brltty-previous-message)
     (2 . speechd-brltty-next-message)
-    ((0 536870914) . speechd-brltty-next-message)
+    ((0 32 2) . speechd-brltty-next-message)
     (11 . speechd-brltty-last-message)
-    ((0 536870937) . speechd-brltty-last-message)
+    ((0 32 25) . speechd-brltty-last-message)
     (12 . speechd-brltty-first-message)
-    ((0 536870938) . speechd-brltty-first-message)
+    ((0 32 26) . speechd-brltty-first-message)
     (23 . speechd-brltty-scroll-left)
-    ((0 536870935) . speechd-brltty-scroll-left)
+    ((0 32 23) . speechd-brltty-scroll-left)
     (24 . speechd-brltty-scroll-right)
-    ((0 536870936) . speechd-brltty-scroll-right)
+    ((0 32 24) . speechd-brltty-scroll-right)
     (25 . speechd-brltty-scroll-to-bol)
-    ((0 536870939) . speechd-brltty-scroll-to-bol)
+    ((0 32 27) . speechd-brltty-scroll-to-bol)
     (26 . speechd-brltty-scroll-to-eol)
-    ((0 536870940) . speechd-brltty-scroll-to-bol)
+    ((0 32 28) . speechd-brltty-scroll-to-bol)
     (29 . speechd-brltty-scroll-to-cursor)
-    ((0 536870941) . speechd-brltty-scroll-to-cursor)
+    ((0 32 29) . speechd-brltty-scroll-to-cursor)
     (8204 . speechd-brltty-finish-message)
-    ((0 536870984) . speechd-brltty-finish-message)
+    ((0 32 72) . speechd-brltty-finish-message)
     (8205 . speechd-brltty-cancel)
-    ((0 536870983) . speechd-brltty-cancel))
+    ((0 32 71) . speechd-brltty-cancel))
   "Alist of Braille display key codes and corresponding Emacs functions.
 If the given key is pressed, the corresponding function is called with a
 `speechd-brltty-driver' instance as its single argument.
diff --git a/speechd-el.texi b/speechd-el.texi
index 5cce5fb..95a8f2a 100644
--- a/speechd-el.texi
+++ b/speechd-el.texi
@@ -1526,7 +1526,7 @@ a @code{speechd-brltty-driver} instance as its single argument (read
 the source code for information about speechd-el output drivers).
 
 The key codes are either integers (for BrlTTY 3.7 and older) or lists
-containing two integers (for BrlTTY 3.8 and newer).  See the default
+containing three integers (for BrlTTY 3.8 and newer).  See the default
 variable value for examples of possible key codes.
 
 The assigned functions needn't be interactive.  Actually as the