diff --git a/boards/arm/lpcxpresso51u68/lpcxpresso51u68_defconfig b/boards/arm/lpcxpresso51u68/lpcxpresso51u68_defconfig
index 1c5669285f8..dd287658c06 100644
--- a/boards/arm/lpcxpresso51u68/lpcxpresso51u68_defconfig
+++ b/boards/arm/lpcxpresso51u68/lpcxpresso51u68_defconfig
@@ -4,7 +4,6 @@ CONFIG_BOARD_LPCXPRESSO51U68=y
 CONFIG_CONSOLE=y
 CONFIG_UART_CONSOLE=y
 CONFIG_SERIAL=y
-CONFIG_PINMUX=y
 CONFIG_UART_INTERRUPT_DRIVEN=y
 CONFIG_GPIO=y
 CONFIG_SYS_CLOCK_HW_CYCLES_PER_SEC=12000000
diff --git a/boards/xtensa/esp32_net/esp32_net_defconfig b/boards/xtensa/esp32_net/esp32_net_defconfig
index 2df29a04d31..1e9296cfc33 100644
--- a/boards/xtensa/esp32_net/esp32_net_defconfig
+++ b/boards/xtensa/esp32_net/esp32_net_defconfig
@@ -15,7 +15,6 @@ CONFIG_UART_CONSOLE=n
 
 CONFIG_XTENSA_USE_CORE_CRT1=n
 
-CONFIG_PINMUX=n
 CONFIG_GPIO=n
 CONFIG_GPIO_ESP32=n