diff --git a/make/defs-orig.mk b/make/defs-orig.mk
index 55086cd7..a63fd1ca 100644
--- a/make/defs-orig.mk
+++ b/make/defs-orig.mk
@@ -53,6 +53,15 @@ PREREQ_CSRC = $(PREREQ_H) $(PREREQ_C) $(PREREQ_CPP)
 
 CONTRIB_MOD = $(addprefix contrib/,$(CONTRIB_LIBS))
 REQUIRED   := $(CONTRIB_MOD) $(REQUIRED)
+
+REQUIRED_DIR  = $(patsubst %,$(MODDIR)/%,$(REQUIRED))
+REQUIRED_DONE = $(patsubst %,%/all.done,$(REQUIRED_DIR))
+REQUIRED_H    = $(foreach dir,$(REQUIRED_DIR),$(wildcard $(dir)/*.h))  
+REQUIRED_C    = $(foreach dir,$(REQUIRED_DIR),$(wildcard $(dir)/*.c)) 
+REQUIRED_CPP  = $(foreach dir,$(REQUIRED_DIR),$(wildcard $(dir)/*.c)) \
+              $(foreach dir,$(PREREQ_DIR),$(wildcard $(dir)/*.cpp)) 
+REQUIRED_CSRC = $(REQUIRED_H) $(REQUIRED_C) $(REQUIRED_CPP)
+
 ALL_H       = $(LOCAL_H) $(PREREQ_H)
 ALL_C       = $(LOCAL_C) $(PREREQ_CPP)
 ALL_CPP     = $(LOCAL_CPP) $(PREREQ_CPP)