diff --git a/make/defs.mk b/make/defs.mk
index 04eb0059..4bcf311a 100644
--- a/make/defs.mk
+++ b/make/defs.mk
@@ -1249,6 +1249,18 @@ EXE_SEARCH_PATH           += $(XCHANGE_DIR)/bin
 PREREQ                    += XCHANGE
 endif
 
+ifneq ($(filter ntv2,$(PREREQ_BUILD)),)
+NTV2_DIR                   = $(firstword $(wildcard $(CVS_PROJ_DIR)/ntv2 /opt/$(FLAVOUR_PATH_PREFIX)ntv2))
+NTV2_VERSION               = $(call version,$(NTV2_DIR))
+RPM_REQUIRES_RUN          += $(FLAVOUR_PREFIX)dspider-ntv2-run = $(NTV2_VERSION)
+RPM_REQUIRES_DEVEL        += $(FLAVOUR_PREFIX)dspider-ntv2-devel = $(NTV2_VERSION)
+PREREQ_BUILD              += ytools
+INCLUDE                   += -I$(NTV2_DIR)/include
+LIBFLAGS                  += -L$(NTV2_DIR)/lib -lntv2
+EXE_SEARCH_PATH           += $(NTV2_DIR)/bin
+PREREQ                    += NTV2
+endif
+
 ifneq ($(filter btools,$(PREREQ_BUILD)),)
 BTOOLS_DIR                 = $(firstword $(wildcard $(CVS_PROJ_DIR)/btools /opt/$(FLAVOUR_PATH_PREFIX)btools))
 BTOOLS_VERSION             = $(call version,$(BTOOLS_DIR))