diff --git a/openbsc/src/libcommon/debug.c b/openbsc/src/libcommon/debug.c
index ca7ff5d..7fb3ecb 100644
--- a/openbsc/src/libcommon/debug.c
+++ b/openbsc/src/libcommon/debug.c
@@ -160,6 +160,11 @@
 		.description = "SMPP interface for external SMS apps",
 		.enabled = 1, .loglevel = LOGL_DEBUG,
 	},
+	[DFILTER] = {
+		.name = "DFILTER",
+		.description = "BSC/NAT IMSI based filtering",
+		.enabled = 1, .loglevel = LOGL_DEBUG,
+	},
 };
 
 enum log_filter {