diff --git a/openbsc/src/debug.c b/openbsc/src/debug.c
index 14d6b60..f88a904 100644
--- a/openbsc/src/debug.c
+++ b/openbsc/src/debug.c
@@ -58,6 +58,7 @@
 	DEBUG_CATEGORY(DMUX,  "DMUX", "", "")
 	DEBUG_CATEGORY(DMEAS,  "DMEAS", "", "")
 	DEBUG_CATEGORY(DSCCP, "DSCCP", "", "")
+	DEBUG_CATEGORY(DMSC, "DMSC", "", "")
 };
 
 static int use_color = 1;