diff --git a/README.md b/README.md
index 1d83194..cdca7c1 100644
--- a/README.md
+++ b/README.md
@@ -236,9 +236,9 @@ fflush  | `(fflush f)` | `true` | Persist buffered writes to disk for a file res
 fread   | `(fread f 16)` | `"abc"` | Read from a file resource.
 feof?   | `(feof? f)` | `true` | Return true if end of file has been reached for a file resource.
 readline | `(readline "What is your name? ")` | `What is your name? ` | Read line of user input using [readline](https://www.php.net/manual/en/function.readline.php).
-readlineAdd | `(readlineAdd "What is your name? ")` | `true` | Add line of user input to readline history using [readline_add_history](https://www.php.net/manual/en/function.readline-add-history.php).
-readlineLoad | `(readlineLoad "historyfile")` | `true` | Read readline history from file using [readline_read_history](https://www.php.net/manual/en/function.readline-read-history.php).
-readlineSave | `(readlineSave "historyfile")` | `true` | Write readline history into file using [readline_write_history](https://www.php.net/manual/en/function.readline-write-history.php).
+readline-add | `(readline-add "What is your name? ")` | `true` | Add line of user input to readline history using [readline_add_history](https://www.php.net/manual/en/function.readline-add-history.php).
+readline-load | `(readline-load "historyfile")` | `true` | Read readline history from file using [readline_read_history](https://www.php.net/manual/en/function.readline-read-history.php).
+readline-save | `(readline-save "historyfile")` | `true` | Write readline history into file using [readline_write_history](https://www.php.net/manual/en/function.readline-write-history.php).
 
 ### Json functions
 
diff --git a/mad/calc.mad b/mad/calc.mad
index 4ddd44a..8fd8bea 100644
--- a/mad/calc.mad
+++ b/mad/calc.mad
@@ -42,12 +42,12 @@
 
 ;; Define a file for readline and load it
 (def readlineFile (str HOME "calc_history"))
-(readlineLoad readlineFile)
+(readline-load readlineFile)
 
 ;; Main loop: Read input from user, add it to readline, and parse it
 (def mainLoop (fn () (let (inp (readline "> "))
-  (do (readlineAdd inp)
-    (readlineSave readlineFile)
+  (do (readline-add inp)
+    (readline-save readlineFile)
     (print (str (parseInput inp) EOL))
     true))))
 
diff --git a/src/Lib/IO.php b/src/Lib/IO.php
index 146fb67..a7842dd 100644
--- a/src/Lib/IO.php
+++ b/src/Lib/IO.php
@@ -72,15 +72,15 @@ class IO implements ILib
             fn ($prompt = null) => readline($prompt)
         ));
 
-        $env->set('readlineAdd', new CoreFunc('readlineAdd', 'Add new line of input to history.', 1, 1,
+        $env->set('readline-add', new CoreFunc('readline-add', 'Add new line of input to history.', 1, 1,
             fn (string $line) => readline_add_history($line)
         ));
 
-        $env->set('readlineLoad', new CoreFunc('readlineLoad', 'Load the history for readline from a file.', 1, 1,
+        $env->set('readline-load', new CoreFunc('readline-load', 'Load the history for readline from a file.', 1, 1,
             fn (string $file) => readline_read_history($file)
         ));
 
-        $env->set('readlineSave', new CoreFunc('readlineSave', 'Save the readline history into a file.', 1, 1,
+        $env->set('readline-save', new CoreFunc('readline-save', 'Save the readline history into a file.', 1, 1,
             fn (string $file) => readline_write_history($file)
         ));
     }