diff --git a/man/wtmpdb.8.xml b/man/wtmpdb.8.xml
index 1cd07ca..3a019d9 100644
--- a/man/wtmpdb.8.xml
+++ b/man/wtmpdb.8.xml
@@ -124,6 +124,16 @@
 		</para>
 	      </listitem>
 	    </varlistentry>
+	    <varlistentry>
+	      <term>
+		<option>-o, --open</option>
+	      </term>
+	      <listitem>
+		<para>
+		  Display only sessions that are still open, i.e. no end of session has been recorded since last boot.
+		</para>
+	      </listitem>
+	    </varlistentry>
 	    <varlistentry>
 	      <term>
 		<option>-p, --present</option> <replaceable>TIME</replaceable>
diff --git a/src/wtmpdb.c b/src/wtmpdb.c
index 4bd4671..50e268a 100644
--- a/src/wtmpdb.c
+++ b/src/wtmpdb.c
@@ -69,7 +69,7 @@ static char *wtmpdb_path = NULL;
 #define LAST_TIMESTAMP_LEN 32
 
 static uint64_t wtmp_start = UINT64_MAX;
-static int after_reboot = 0;
+static uint64_t after_reboot = 0;
 
 /* options for last */
 static int hostlast = 0;
@@ -80,6 +80,7 @@ static int iflag = 0;
 static int jflag = 0;
 static int wflag = 0;
 static int xflag = 0;
+static int open_sessions = 0; /* show open sessions, only */
 static const int name_len = 8; /* LAST_LOGIN_LEN */
 static int login_fmt = TIMEFMT_SHORT;
 static int login_len = 16; /* 16 = short, 24 = full */
@@ -451,6 +452,15 @@ print_entry (void *unused __attribute__((__unused__)),
       || (endptr == argv[3]) || (*endptr != '\0'))
     fprintf (stderr, "Invalid numeric time entry for 'login': '%s'\n",
 	     argv[3]);
+  if (login_t < wtmp_start)
+    wtmp_start = login_t;
+
+  /** Can't do it earlier because there is no contract that this function
+   * gets only invoked on lists sorted by Login time. Side effect is, that this
+   * way "wtmpdb begins ..." doesn't lie (as maxentries option does).
+   */
+  if (open_sessions && after_reboot > login_t)
+	return 0;
 
   if (argv[4])
     {
@@ -461,9 +471,6 @@ print_entry (void *unused __attribute__((__unused__)),
 		 argv[4]);
     }
 
-  if (login_t < wtmp_start)
-    wtmp_start = login_t;
-
   int swap = type == xflag && BOOT_TIME && logout_t != 0;
 
   if ((since && since > from_usec(swap ? logout_t : login_t)) ||
@@ -494,6 +501,8 @@ print_entry (void *unused __attribute__((__unused__)),
 
   if (logout_t != 0)
     {
+	  if (open_sessions)
+	    return 0;
       logout_t = strtoull(argv[4], &endptr, 10);
       if ((errno == ERANGE && logout_t == ULLONG_MAX)
 	  || (endptr == argv[4]) || (*endptr != '\0'))
@@ -511,7 +520,7 @@ print_entry (void *unused __attribute__((__unused__)),
     }
   else /* login but no logout */
     {
-      if (after_reboot)
+      if (after_reboot > login_t)
 	{
 	  snprintf (times.logout, sizeof (times.logout), "crash");
 	  times.length[0] = '\0';
@@ -555,7 +564,7 @@ print_entry (void *unused __attribute__((__unused__)),
   if (type == BOOT_TIME)
     {
       tty = "system boot";
-      after_reboot = 1;
+      after_reboot = login_t;
     }
 
   char *print_service = NULL;
@@ -658,6 +667,7 @@ usage (int retval)
   fputs ("  -i, --ip            Translate hostnames to IP addresses\n", output);
   fputs ("  -j, --json          Generate JSON output\n", output);
   fputs ("  -n, --limit N, -N   Display only first N entries\n", output);
+  fputs ("  -o, --open          Display open sessions, only.\n", output);
   fputs ("  -p, --present TIME  Display who was present at TIME\n", output);
   fputs ("  -R, --nohostname    Don't display hostname\n", output);
   fputs ("  -S, --service       Display PAM service used to login\n", output);
@@ -775,6 +785,7 @@ main_last (int argc, char **argv)
     {"fulltimes", no_argument, NULL, 'F'},
     {"ip", no_argument, NULL, 'i'},
     {"limit", required_argument, NULL, 'n'},
+    {"open", no_argument, NULL, 'o'},
     {"present", required_argument, NULL, 'p'},
     {"nohostname", no_argument, NULL, 'R'},
     {"service", no_argument, NULL, 'S'},
@@ -789,7 +800,7 @@ main_last (int argc, char **argv)
   char *error = NULL;
   int c;
 
-  while ((c = getopt_long (argc, argv, "0123456789adf:Fijn:p:RSs:t:wx",
+  while ((c = getopt_long (argc, argv, "0123456789adf:Fijn:op:RSs:t:wx",
 			   longopts, NULL)) != -1)
     {
       switch (c)
@@ -830,6 +841,9 @@ main_last (int argc, char **argv)
 	case 'n':
 	  maxentries = strtoul (optarg, NULL, 10);
 	  break;
+	case 'o':
+	  open_sessions = 1;
+	  break;
 	case 'p':
 	  if (parse_time (optarg, &present) < 0)
 	    {