diff --git a/boards/risc-v/k210/maix-bit/configs/kostest/defconfig b/boards/risc-v/k210/maix-bit/configs/kostest/defconfig
index 5254e0bae78..82b54a06ec3 100644
--- a/boards/risc-v/k210/maix-bit/configs/kostest/defconfig
+++ b/boards/risc-v/k210/maix-bit/configs/kostest/defconfig
@@ -17,7 +17,6 @@ CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARCH_USE_MPU=y
 CONFIG_BOARD_LOOPSPERMSEC=46000
 CONFIG_BUILD_PROTECTED=y
-CONFIG_BUILTIN=y
 CONFIG_DEBUG_ASSERTIONS=y
 CONFIG_DEBUG_ERROR=y
 CONFIG_DEBUG_FEATURES=y