diff --git a/include/subdir.mk b/include/subdir.mk
index fe46ed0de04c26d2d1f197139cde3ba3bb000dc9..046a6adf6f370c32310d8b5d933a8eb23b833c42 100644
--- a/include/subdir.mk
+++ b/include/subdir.mk
@@ -5,7 +5,7 @@
 # l: show legacy targets
 
 ifeq ($(DEBUG),all)
-  build_debug:=dt
+  build_debug:=dlt
 else
   build_debug:=$(DEBUG)
 endif