diff --git a/README.md b/README.md
index 501be0b..d78a3ee 100644
--- a/README.md
+++ b/README.md
@@ -74,7 +74,7 @@ The command-line interface is straightforward as reflected in the output from
       -m, --map <flags>                Map special characters
       -c, --color 0..255|none|list     Colorize tio text (default: 15)
       -S, --socket <socket>            Redirect I/O to socket
-      -x, --hex                        Enable hexadecimal mode
+      -x, --hexadecimal                Enable hexadecimal mode
       -v, --version                    Display version
       -h, --help                       Display help
 
diff --git a/man/tio.1.in b/man/tio.1.in
index fe273b1..c25de10 100644
--- a/man/tio.1.in
+++ b/man/tio.1.in
@@ -124,7 +124,7 @@ If defining more than one flag, the flags must be comma separated.
 .RE
 
 .TP
-.BR \-x ", " \-\-hex\-mode
+.BR \-x ", " \-\-hexadecimal
 
 Enable hexadecimal mode.
 
@@ -260,7 +260,7 @@ Set timestamp format
 Map special characters on input or output
 .IP "\fBcolor"
 Colorize tio text using ANSI color code ranging from 0 to 255
-.IP "\fBhex-mode"
+.IP "\fBhexadecimal"
 Enable hexadecimal mode
 .IP "\fBsocket"
 Set socket to redirect I/O to
diff --git a/src/configfile.c b/src/configfile.c
index 41c95bc..f48772c 100644
--- a/src/configfile.c
+++ b/src/configfile.c
@@ -171,7 +171,7 @@ static int data_handler(void *user, const char *section, const char *name,
                 option.local_echo = false;
             }
         }
-        else if (!strcmp(name, "hex-mode"))
+        else if (!strcmp(name, "hexadecimal"))
         {
             if (!strcmp(value, "enable"))
             {
diff --git a/src/options.c b/src/options.c
index bc05bc7..0d71517 100644
--- a/src/options.c
+++ b/src/options.c
@@ -88,7 +88,7 @@ void print_help(char *argv[])
     printf("  -m, --map <flags>                Map special characters\n");
     printf("  -c, --color 0..255|none|list     Colorize tio text (default: 15)\n");
     printf("  -S, --socket <socket>            Redirect I/O to socket\n");
-    printf("  -x, --hex-mode                   Enable hexadecimal mode\n");
+    printf("  -x, --hexadecimal                Enable hexadecimal mode\n");
     printf("  -v, --version                    Display version\n");
     printf("  -h, --help                       Display help\n");
     printf("\n");