diff --git a/openbsc/include/openbsc/debug.h b/openbsc/include/openbsc/debug.h
index c8c0013..447c358 100644
--- a/openbsc/include/openbsc/debug.h
+++ b/openbsc/include/openbsc/debug.h
@@ -23,6 +23,8 @@
 #define DSCCP		0x10000
 #define DMSC		0x20000
 
+#define DMGCP		0x40000
+
 #ifdef DEBUG
 #define DEBUGP(ss, fmt, args...) debugp(ss, __FILE__, __LINE__, 0, fmt, ## args)
 #define DEBUGPC(ss, fmt, args...) debugp(ss, __FILE__, __LINE__, 1, fmt, ## args)
diff --git a/openbsc/src/debug.c b/openbsc/src/debug.c
index f88a904..5dc2e0f 100644
--- a/openbsc/src/debug.c
+++ b/openbsc/src/debug.c
@@ -59,6 +59,7 @@
 	DEBUG_CATEGORY(DMEAS,  "DMEAS", "", "")
 	DEBUG_CATEGORY(DSCCP, "DSCCP", "", "")
 	DEBUG_CATEGORY(DMSC, "DMSC", "", "")
+	DEBUG_CATEGORY(DMGCP, "DMGCP", "", "")
 };
 
 static int use_color = 1;