diff --git a/include/osmocom/core/logging.h b/include/osmocom/core/logging.h
index 79eec10..36ce941 100644
--- a/include/osmocom/core/logging.h
+++ b/include/osmocom/core/logging.h
@@ -125,7 +125,8 @@
 #define DLMGCP		-17	/*!< Osmocom MGCP */
 #define DLJIBUF		-18	/*!< Osmocom Jitter Buffer */
 #define DLRSPRO		-19	/*!< Osmocom Remote SIM Protocol */
-#define OSMO_NUM_DLIB	19	/*!< Number of logging sub-systems in libraries */
+#define DLNS		-20	/*!< Osmocom NS layer */
+#define OSMO_NUM_DLIB	20	/*!< Number of logging sub-systems in libraries */
 
 /* Colors that can be used in log_info_cat.color */
 #define OSMO_LOGCOLOR_NORMAL NULL