diff --git a/configs/b-l475e-iot01a/nsh/defconfig b/configs/b-l475e-iot01a/nsh/defconfig
index 22560278ee2..11cb7a2eec0 100644
--- a/configs/b-l475e-iot01a/nsh/defconfig
+++ b/configs/b-l475e-iot01a/nsh/defconfig
@@ -8,7 +8,7 @@ CONFIG_ARCH_CHIP_STM32L4=y
 CONFIG_ARCH_CHIP_STM32L475VG=y
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARCH="arm"
-CONFIG_BOARD_LOOPSPERMSEC=16717
+CONFIG_BOARD_LOOPSPERMSEC=8025
 CONFIG_BUILTIN=y
 CONFIG_DISABLE_POLL=y
 CONFIG_EXAMPLES_NSH=y
diff --git a/configs/b-l475e-iot01a/spirit-6lowpan/defconfig b/configs/b-l475e-iot01a/spirit-6lowpan/defconfig
index bdbda4cb0f5..457df3cc1b1 100644
--- a/configs/b-l475e-iot01a/spirit-6lowpan/defconfig
+++ b/configs/b-l475e-iot01a/spirit-6lowpan/defconfig
@@ -10,7 +10,7 @@ CONFIG_ARCH_CHIP_STM32L4=y
 CONFIG_ARCH_CHIP_STM32L475VG=y
 CONFIG_ARCH_STACKDUMP=y
 CONFIG_ARCH="arm"
-CONFIG_BOARD_LOOPSPERMSEC=16717
+CONFIG_BOARD_LOOPSPERMSEC=8025
 CONFIG_BUILTIN=y
 CONFIG_DRIVERS_WIRELESS=y
 CONFIG_EXAMPLES_NETTEST_DEVNAME="wpan0"