diff --git a/Makefile.include b/Makefile.include
index 79b3e2b018..9d18b00fbb 100644
--- a/Makefile.include
+++ b/Makefile.include
@@ -47,6 +47,7 @@ RIOTCPU                         ?= $(RIOTBASE)/cpu
 RIOTBOARD                       ?= $(RIOTBASE)/boards
 EXTERNAL_BOARD_DIRS             ?=
 RIOTMAKE                        ?= $(RIOTBASE)/makefiles
+RIOTKCONFIG                     ?= $(RIOTBASE)/kconfigs
 RIOTPKG                         ?= $(RIOTBASE)/pkg
 RIOTTOOLS                       ?= $(RIOTBASE)/dist/tools
 RIOTPROJECT                     ?= $(shell git rev-parse --show-toplevel 2>/dev/null || pwd)
diff --git a/makefiles/vars.inc.mk b/makefiles/vars.inc.mk
index a77a351f53..f7808cae23 100644
--- a/makefiles/vars.inc.mk
+++ b/makefiles/vars.inc.mk
@@ -38,6 +38,7 @@ export RIOTPKG               # For overriding RIOT's pkg directory
 export RIOTTOOLS             # Location of host machine tools
 export RIOTPROJECT           # Top level git root of the project being built, or PWD if not a git repository
 export RIOTMAKE              # Location of all supplemental Makefiles (such as this file)
+export RIOTKCONFIG           # Location of all supplemental Kconfig files
 export BINDIRBASE            # This is the folder where the application should be built in. For each BOARD a different subfolder is used.
 export BINDIR                # This is the folder where the application should be built in.
 export BUILD_DIR             # This is the base folder to store common build files and artifacts, e.g. test results.