diff --git a/ChangeLog b/ChangeLog
index 9c32932..d3fae66 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -16,11 +16,11 @@ Changes since tio v1.21:
 
 Changes since tio v1.20:
 
- * Add support for hexidecimal mode
+ * Add support for hexadecimal mode
 
    A new key command 'ctrl-t h' is introduced which toggles between
-   hexidecial mode and normal mode. When in hexidecimal mode data received
-   will be printed in hexidecimal.
+   hexadecimal mode and normal mode. When in hexadecimal mode data received
+   will be printed in hexadecimal.
 
  * Do not distribute src/bash_completion/tio
 
diff --git a/man/tio.1 b/man/tio.1
index ca551bb..93a239a 100644
--- a/man/tio.1
+++ b/man/tio.1
@@ -75,7 +75,7 @@ Send serial break (triggers SysRq on Linux, etc.)
 .IP "\fBctrl-t c"
 Show configuration (baudrate, databits, etc.)
 .IP "\fBctrl-t h"
-Toggle hexidecimal mode
+Toggle hexadecimal mode
 .IP "\fBctrl-t l"
 Clear screen
 .IP "\fBctrl-t q"
diff --git a/src/tty.c b/src/tty.c
index 6b6723c..02b3feb 100644
--- a/src/tty.c
+++ b/src/tty.c
@@ -93,7 +93,7 @@ void handle_command_sequence(char input_char, char previous_char, char *output_c
                 tio_printf(" ctrl-t ?   List available key commands");
                 tio_printf(" ctrl-t b   Send break");
                 tio_printf(" ctrl-t c   Show configuration");
-                tio_printf(" ctrl-t h   Toggle hexidecimal mode");
+                tio_printf(" ctrl-t h   Toggle hexadecimal mode");
                 tio_printf(" ctrl-t l   Clear screen");
                 tio_printf(" ctrl-t q   Quit");
                 tio_printf(" ctrl-t s   Show statistics");
@@ -118,12 +118,12 @@ void handle_command_sequence(char input_char, char previous_char, char *output_c
                 break;
 
             case KEY_H:
-                /* Toggle hexidecimal printing mode */
+                /* Toggle hexadecimal printing mode */
                 if (print_mode == NORMAL)
                 {
                     print = print_hex;
                     print_mode = HEX;
-                    tio_printf("Switched to hexidecimal mode");
+                    tio_printf("Switched to hexadecimal mode");
                 }
                 else
                 {