diff --git a/Makefile b/Makefile
index 77cd3b7..083d675 100644
--- a/Makefile
+++ b/Makefile
@@ -5,7 +5,7 @@
 PATH_BIN    := bin
 PATH_SRC    := src
 rwildcard    = $(foreach d,$(wildcard $1*),$(call rwildcard,$d/,$2) $(filter $(subst *,%,$2),$d))
-MK_MODULES  := $(call rwildcard, src, */0module.mk)
+MK_MODULES  := $(call rwildcard, $(PATH_SRC), */0module.mk)
 BUILD_ALL   := "Use 'make help' for possible targets."
 BUILD_HELP  := "Use one of the following build targets;"