debug: Use the right enum value for the ref counting group.
diff --git a/openbsc/src/debug.c b/openbsc/src/debug.c
index 6d67ac1..3bb5309 100644
--- a/openbsc/src/debug.c
+++ b/openbsc/src/debug.c
@@ -98,7 +98,7 @@
 	DEBUG_CATEGORY(DMGCP, "DMGCP", "", "")
 	DEBUG_CATEGORY(DHO, "DHO", "", "")
 	DEBUG_CATEGORY(DDB, "DDB", "", "")
-	DEBUG_CATEGORY(DDB, "DREF", "", "")
+	DEBUG_CATEGORY(DREF, "DREF", "", "")
 };
 
 static const struct value_string loglevel_strs[] = {