diff --git a/srpt/src/Makefile b/srpt/src/Makefile
index 5beb4781c..5d0338c86 100644
--- a/srpt/src/Makefile
+++ b/srpt/src/Makefile
@@ -1,4 +1,5 @@
 LINUXINCLUDE := $(PRE_CFLAGS) $(LINUXINCLUDE)
+CPPFLAGS     := $(PRE_CFLAGS) $(CPPFLAGS)
 EXTRA_CFLAGS += -I$(SCST_INC_DIR)
 
 -include $(SUBDIRS)/../build_mode