diff --git a/src/log.c b/src/log.c
index 614efcc..57ca05c 100644
--- a/src/log.c
+++ b/src/log.c
@@ -45,7 +45,8 @@
     {NC_VERB_ERROR, "[ERR]"},
     {NC_VERB_WARNING, "[WRN]"},
     {NC_VERB_VERBOSE, "[INF]"},
-    {NC_VERB_DEBUG, "[DBG]"}
+    {NC_VERB_DEBUG, "[DBG]"},
+    {NC_VERB_DEBUG_LOWLVL, "[DBL]"}
 };
 
 #ifdef NC_ENABLED_SSH
diff --git a/src/log.h b/src/log.h
index b8dbd1c..7933e28 100644
--- a/src/log.h
+++ b/src/log.h
@@ -31,7 +31,8 @@
     NC_VERB_ERROR = 0,   /**< Print only error messages. */
     NC_VERB_WARNING = 1, /**< Print error and warning messages. */
     NC_VERB_VERBOSE = 2, /**< Besides errors and warnings, print some other verbose messages. */
-    NC_VERB_DEBUG = 3    /**< Print all messages including some development debug messages. */
+    NC_VERB_DEBUG = 3,   /**< Print almost all messages including some development debug messages. */
+    NC_VERB_DEBUG_LOWLVL = 4, /**< Print all messages including low level debug messages. */
 } NC_VERB_LEVEL;
 
 /**
@@ -77,7 +78,7 @@
  */
 void nc_set_print_clb(void (*clb)(NC_VERB_LEVEL, const char *));
 
-/**@} Miscellaneous */
+/** @} */
 
 #ifdef __cplusplus
 }
diff --git a/src/log_p.h b/src/log_p.h
index 5cb6aa0..d142131 100644
--- a/src/log_p.h
+++ b/src/log_p.h
@@ -42,6 +42,7 @@
 #define WRN(format,args...) if(verbose_level>=NC_VERB_WARNING){prv_printf(NC_VERB_WARNING,format,##args);}
 #define VRB(format,args...) if(verbose_level>=NC_VERB_VERBOSE){prv_printf(NC_VERB_VERBOSE,format,##args);}
 #define DBG(format,args...) if(verbose_level>=NC_VERB_DEBUG){prv_printf(NC_VERB_DEBUG,format,##args);}
+#define DBL(format,args...) if(verbose_level>=NC_VERB_DEBUG_LOWLVL){prv_printf(NC_VERB_DEBUG_LOWLVL,format,##args);}
 
 #define ERRMEM ERR("%s: memory reallocation failed (%s:%d).", __func__, __FILE__, __LINE__)
 #define ERRARG(arg) ERR("%s: invalid argument (%s).", __func__, arg)
diff --git a/src/session_server.c b/src/session_server.c
index 763fcf4..919d406 100644
--- a/src/session_server.c
+++ b/src/session_server.c
@@ -881,7 +881,7 @@
 
     /* add ourselves into the queue */
     nc_ps_queue_add_id(ps, id);
-    DBG("PS 0x%p TID %lu queue: added %u, head %u, lenght %u", ps, (long unsigned int)pthread_self(), *id,
+    DBL("PS 0x%p TID %lu queue: added %u, head %u, lenght %u", ps, (long unsigned int)pthread_self(), *id,
             ps->queue[ps->queue_begin], ps->queue_len);
 
     /* is it our turn? */
@@ -942,7 +942,7 @@
 
     /* remove ourselves from the queue */
     nc_ps_queue_remove_id(ps, id);
-    DBG("PS 0x%p TID %lu queue: removed %u, head %u, lenght %u", ps, (long unsigned int)pthread_self(), id,
+    DBL("PS 0x%p TID %lu queue: removed %u, head %u, lenght %u", ps, (long unsigned int)pthread_self(), id,
             ps->queue[ps->queue_begin], ps->queue_len);
 
     /* broadcast to all other threads that the queue moved */