diff --git a/boards/px4/fmu-v5/nuttx-config/cryptotest/defconfig b/boards/px4/fmu-v5/nuttx-config/cryptotest/defconfig
index 5434a63fee..8fc96e140e 100644
--- a/boards/px4/fmu-v5/nuttx-config/cryptotest/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/cryptotest/defconfig
@@ -89,6 +89,7 @@ CONFIG_LIBC_LONG_LONG=y
 CONFIG_LIBC_STRERROR=y
 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
diff --git a/boards/px4/fmu-v5/nuttx-config/debug/defconfig b/boards/px4/fmu-v5/nuttx-config/debug/defconfig
index 4b8db0e6f8..ed998be8a5 100644
--- a/boards/px4/fmu-v5/nuttx-config/debug/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/debug/defconfig
@@ -136,6 +136,7 @@ CONFIG_LIBC_LONG_LONG=y
 CONFIG_LIBC_STRERROR=y
 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
diff --git a/boards/px4/fmu-v5/nuttx-config/nsh/defconfig b/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
index 8d5bf35a30..16d490f724 100644
--- a/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/nsh/defconfig
@@ -87,6 +87,7 @@ CONFIG_LIBC_LONG_LONG=y
 CONFIG_LIBC_STRERROR=y
 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
diff --git a/boards/px4/fmu-v5/nuttx-config/stackcheck/defconfig b/boards/px4/fmu-v5/nuttx-config/stackcheck/defconfig
index e945e85751..a4a81e2f72 100644
--- a/boards/px4/fmu-v5/nuttx-config/stackcheck/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/stackcheck/defconfig
@@ -88,6 +88,7 @@ CONFIG_LIBC_LONG_LONG=y
 CONFIG_LIBC_STRERROR=y
 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
diff --git a/boards/px4/fmu-v5/nuttx-config/uavcanv1/defconfig b/boards/px4/fmu-v5/nuttx-config/uavcanv1/defconfig
index cea3a62fd4..8f2930d3e7 100644
--- a/boards/px4/fmu-v5/nuttx-config/uavcanv1/defconfig
+++ b/boards/px4/fmu-v5/nuttx-config/uavcanv1/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