diff --git a/src/include/tio/options.h b/src/include/tio/options.h
index dc57352..0ec86bb 100644
--- a/src/include/tio/options.h
+++ b/src/include/tio/options.h
@@ -30,9 +30,9 @@
 /* Options */
 struct option_t
 {
-    char tty_device[MAXPATHLEN];
+    const char *tty_device;
     bool log;
-    char log_filename[_POSIX_ARG_MAX];
+    const char *log_filename;
     bool no_autoconnect;
     int output_delay;
     struct termios tio;
diff --git a/src/options.c b/src/options.c
index 83d94ec..b32601d 100644
--- a/src/options.c
+++ b/src/options.c
@@ -314,7 +314,7 @@ void parse_options(int argc, char *argv[])
 
             case 'l':
                 option.log = true;
-                strncpy(option.log_filename, optarg, _POSIX_ARG_MAX);
+                option.log_filename = optarg;
                 break;
 
             case 'v':
@@ -344,7 +344,7 @@ void parse_options(int argc, char *argv[])
 
     /* Assume first non-option is the tty device name */
     if (optind < argc)
-        strcpy(option.tty_device, argv[optind++]);
+        option.tty_device = argv[optind++];
 
     if (strlen(option.tty_device) == 0)
     {