diff --git a/boards/modalai/fc-v2/nuttx-config/nsh/defconfig b/boards/modalai/fc-v2/nuttx-config/nsh/defconfig
index aa27b577c7..75fc6b1aaf 100644
--- a/boards/modalai/fc-v2/nuttx-config/nsh/defconfig
+++ b/boards/modalai/fc-v2/nuttx-config/nsh/defconfig
@@ -89,6 +89,7 @@ CONFIG_LIBC_STRERROR=y
 CONFIG_FS_PROCFS_MAX_TASKS=64
 CONFIG_MEMSET_64BIT=y
 CONFIG_MEMSET_OPTSPEED=y
+CONFIG_MKFATFS_BUFFER_ALIGMENT=32
 CONFIG_MMCSD=y
 CONFIG_MMCSD_SDIO=y
 CONFIG_MMCSD_SDIOWAIT_WRCOMPLETE=y