diff --git a/make/defs.mk b/make/defs.mk
index e0de7c7b..e48562de 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -254,7 +254,7 @@ AR                    ?= ar
 endif
 
 # makefile helpers
-FIND_SUBDIRS           = $(filter-out . .. ./nomake ./CVS $(addprefix ./,$(IGNORE_SUBDIRS)), $(shell find . -maxdepth 1 -type d))
+FIND_SUBDIRS           = $(filter-out . .. ./nomake ./CVS $(addprefix ./,$(IGNORE_SUBDIRS)), $(patsubst %/,%,$(dir $(shell find . -maxdepth 2 -mindepth 2 -iname Makefile))))
 SUBDIRS_TO_ITERATE     = $(filter-out $(IGNORE_SUBDIRS),$(SUBDIRS))
 
 # compiler and linker