diff --git a/src/lib/spinel/spinel.h b/src/lib/spinel/spinel.h
index 3a2c81a6d..bc1b8d564 100644
--- a/src/lib/spinel/spinel.h
+++ b/src/lib/spinel/spinel.h
@@ -706,7 +706,7 @@ enum
     SPINEL_NCP_LOG_REGION_OT_UTIL     = 17,
     SPINEL_NCP_LOG_REGION_OT_BBR      = 18,
     SPINEL_NCP_LOG_REGION_OT_MLR      = 19,
-    SPINEL_NCP_LOG_REGION_OT_DUA      = 10,
+    SPINEL_NCP_LOG_REGION_OT_DUA      = 20,
     SPINEL_NCP_LOG_REGION_OT_BR       = 21,
     SPINEL_NCP_LOG_REGION_OT_SRP      = 22,
     SPINEL_NCP_LOG_REGION_OT_DNS      = 23,