diff --git a/epochX/cudacpp/gg_tt.mad/SubProcesses/cudacpp.mk b/epochX/cudacpp/gg_tt.mad/SubProcesses/cudacpp.mk
index 3465ea15ef..62a77c78bb 100644
--- a/epochX/cudacpp/gg_tt.mad/SubProcesses/cudacpp.mk
+++ b/epochX/cudacpp/gg_tt.mad/SubProcesses/cudacpp.mk
@@ -7,7 +7,7 @@
 #=== NB: different names (e.g. cudacpp.mk and cudacpp_src.mk) are used in the Subprocess and src directories
 #=== NB: use ':=' to ensure that the value is not modified further down after including make_opts
 
-CUDACPP_MAKEFILE := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
+override CUDACPP_MAKEFILE := $(word $(words $(MAKEFILE_LIST)),$(MAKEFILE_LIST))
 $(info CUDACPP_MAKEFILE='$(CUDACPP_MAKEFILE)')
 
 CUDACPP_SRC_MAKEFILE = cudacpp_src.mk