diff --git a/configs/stm32mp15_basic_defconfig b/configs/stm32mp15_basic_defconfig
index e5d9e8b..c7dd292 100644
--- a/configs/stm32mp15_basic_defconfig
+++ b/configs/stm32mp15_basic_defconfig
@@ -140,4 +140,5 @@
 CONFIG_VIDEO_STM32_DSI=y
 CONFIG_VIDEO_STM32_MAX_XRES=1280
 CONFIG_VIDEO_STM32_MAX_YRES=800
+CONFIG_ERRNO_STR=y
 CONFIG_FDT_FIXUP_PARTITIONS=y
diff --git a/configs/stm32mp15_trusted_defconfig b/configs/stm32mp15_trusted_defconfig
index 9e61b5d..ca4a108 100644
--- a/configs/stm32mp15_trusted_defconfig
+++ b/configs/stm32mp15_trusted_defconfig
@@ -127,4 +127,5 @@
 CONFIG_VIDEO_STM32_DSI=y
 CONFIG_VIDEO_STM32_MAX_XRES=1280
 CONFIG_VIDEO_STM32_MAX_YRES=800
+CONFIG_ERRNO_STR=y
 CONFIG_FDT_FIXUP_PARTITIONS=y