diff --git a/example/config b/example/config
index 1b66d07..c208fba 100644
--- a/example/config
+++ b/example/config
@@ -22,6 +22,7 @@ no-autoconnect = disable
 hexadecimal = disable
 timestamp = disable
 log = disable
+log-append = disable
 log-strip = disable
 local-echo = disable
 color = bold
diff --git a/man/tio.1.in b/man/tio.1.in
index 36118e5..ba2a9ad 100644
--- a/man/tio.1.in
+++ b/man/tio.1.in
@@ -141,6 +141,11 @@ The filename can be manually set using the \-\-log-file option.
 
 Set log filename.
 
+.TP
+.BR "    \-\-log-append
+
+Append to log file.
+
 .TP
 .BR "    \-\-log-strip
 
diff --git a/man/tio.1.txt b/man/tio.1.txt
index 2aa04e6..252ca60 100644
--- a/man/tio.1.txt
+++ b/man/tio.1.txt
@@ -108,6 +108,10 @@ OPTIONS
 
               Set log filename.
 
+           --log-append
+
+              Append to log file.
+
            --log-strip
 
               Strip control characters and escape sequences from log.
diff --git a/src/configfile.c b/src/configfile.c
index d3dbd16..6715059 100644
--- a/src/configfile.c
+++ b/src/configfile.c
@@ -198,6 +198,10 @@ static int data_handler(void *user, const char *section, const char *name,
             asprintf(&c.log_filename, "%s", value);
             option.log_filename = c.log_filename;
         }
+        else if (!strcmp(name, "log-append"))
+        {
+            option.log_append = read_boolean(value, name);
+        }
         else if (!strcmp(name, "log-strip"))
         {
             option.log_strip = read_boolean(value, name);
diff --git a/src/log.c b/src/log.c
index d0cf543..de3be86 100644
--- a/src/log.c
+++ b/src/log.c
@@ -69,8 +69,17 @@ int log_open(const char *filename)
 
     log_filename = filename;
 
-    // Open log file in append write mode
-    fp = fopen(filename, "a+");
+    // Open log file
+    if (option.log_append)
+    {
+        // Appends to existing log file
+        fp = fopen(filename, "a+");
+    }
+    else
+    {
+        // Truncates existing log file
+        fp = fopen(filename, "w+");
+    }
     if (fp == NULL)
     {
         tio_warning_printf("Could not open log file %s (%s)", filename, strerror(errno));
diff --git a/src/options.c b/src/options.c
index eb75144..6217cc4 100644
--- a/src/options.c
+++ b/src/options.c
@@ -74,6 +74,7 @@ struct option_t option =
     .ri_pulse_duration = 100,
     .no_autoconnect = false,
     .log = false,
+    .log_append = false,
     .log_filename = NULL,
     .log_strip = false,
     .local_echo = false,
@@ -119,6 +120,7 @@ void print_help(char *argv[])
     printf("  -L, --list-devices                     List available serial devices by ID\n");
     printf("  -l, --log                              Enable log to file\n");
     printf("      --log-file <filename>              Set log filename\n");
+    printf("      --log-append                       Append to log file\n");
     printf("      --log-strip                        Strip control characters and escape sequences\n");
     printf("  -m, --map <flags>                      Map characters\n");
     printf("  -c, --color 0..255|bold|none|list      Colorize tio text (default: bold)\n");
diff --git a/src/options.h b/src/options.h
index 8ae556d..b18d8ff 100644
--- a/src/options.h
+++ b/src/options.h
@@ -48,6 +48,7 @@ struct option_t
     unsigned int ri_pulse_duration;
     bool no_autoconnect;
     bool log;
+    bool log_append;
     bool log_strip;
     bool local_echo;
     enum timestamp_t timestamp;