diff --git a/project/Makefile.in b/project/Makefile.in
index 49aec141a5..85c0eaeed3 100644
--- a/project/Makefile.in
+++ b/project/Makefile.in
@@ -10,6 +10,9 @@ QUIET:=$(if $(findstring s,$(MAKEFLAGS)),-q,)
 
 # Strip off the annoying quoting
 ARCH:=$(strip $(subst ",, $(BR2_ARCH)))
+ifeq ($(ARCH),xtensa)
+ARCH:=$(ARCH)_$(strip $(subst ",,$(BR2_xtensa_core_name)))
+endif
 #"))
 WGET:=$(strip $(subst ",, $(BR2_WGET))) $(SPIDER) $(QUIET)
 #"))