diff --git a/app/boards/arm/planck/planck_rev6_defconfig b/app/boards/arm/planck/planck_rev6_defconfig
index a440ff17..e34ce002 100644
--- a/app/boards/arm/planck/planck_rev6_defconfig
+++ b/app/boards/arm/planck/planck_rev6_defconfig
@@ -20,9 +20,6 @@ CONFIG_CLOCK_STM32_HSE_CLOCK=8000000
 CONFIG_CLOCK_STM32_SYSCLK_SRC_PLL=y
 # use HSE as PLL input
 CONFIG_CLOCK_STM32_PLL_SRC_HSE=y
-# however, the board does not have an external oscillator, so just use
-# the 8MHz clock signal coming from integrated STLink
-CONFIG_CLOCK_STM32_HSE_BYPASS=y
 # produce 72MHz clock at PLL output
 CONFIG_CLOCK_STM32_PLL_PREDIV=1
 CONFIG_CLOCK_STM32_PLL_MULTIPLIER=9