diff --git a/configs/kontron_sl28_defconfig b/configs/kontron_sl28_defconfig
index c1a096799c..12720f343e 100644
--- a/configs/kontron_sl28_defconfig
+++ b/configs/kontron_sl28_defconfig
@@ -73,6 +73,7 @@ CONFIG_MMC_HS400_SUPPORT=y
 CONFIG_FSL_ESDHC=y
 CONFIG_FSL_ESDHC_SUPPORT_ADMA2=y
 CONFIG_DM_SPI_FLASH=y
+# CONFIG_SPI_FLASH_UNLOCK_ALL is not set
 CONFIG_SPI_FLASH_WINBOND=y
 # CONFIG_SPI_FLASH_USE_4K_SECTORS is not set
 CONFIG_PHYLIB=y