diff -r bfa935ab7f85 -r 7fc65395188e src/logging.c
--- a/src/logging.c	Fri May 11 18:46:31 2018 +0200
+++ b/src/logging.c	Fri May 11 19:48:19 2018 +0200
@@ -50,6 +50,8 @@
         ucx_map_int_put(logger->levels, l, (void*) "[WARNING]");
         l = UCX_LOGGER_INFO;
         ucx_map_int_put(logger->levels, l, (void*) "[INFO]");
+        l = UCX_LOGGER_DEBUG;
+        ucx_map_int_put(logger->levels, l, (void*) "[DEBUG]");
         l = UCX_LOGGER_TRACE;
         ucx_map_int_put(logger->levels, l, (void*) "[TRACE]");
     }
@@ -75,6 +77,9 @@
         
         if ((logger->mask & UCX_LOGGER_LEVEL) > 0) {
             text = (char*) ucx_map_int_get(logger->levels, level);
+            if (!text) {
+                text = "[UNKNOWN]";
+            }
             n = strlen(text);
             n = n > 256 ? 256 : n;
             memcpy(msg+k, text, n);