diff --git a/doc/CMakeLists.txt b/doc/CMakeLists.txt
index 166422cc85a..54a65b52a9d 100644
--- a/doc/CMakeLists.txt
+++ b/doc/CMakeLists.txt
@@ -196,12 +196,10 @@ add_custom_target(
   PYTHONPATH="${ZEPHYR_BASE}/scripts/kconfig${SEP}$ENV{PYTHONPATH}"
   ZEPHYR_BASE=${ZEPHYR_BASE}
   srctree=${ZEPHYR_BASE}
-  KERNELVERSION=${KERNELVERSION}
   BOARD_DIR=boards/*/*/
   ARCH=*
   ARCH_DIR=arch/
   SOC_DIR=soc/
-  SRCARCH=x86
   CMAKE_BINARY_DIR=${CMAKE_BINARY_DIR}
   KCONFIG_WARN_UNDEF=y
   KCONFIG_TURBO_MODE=${KCONFIG_TURBO_MODE}