diff --git a/nuttx-configs/aerocore/nsh/defconfig b/nuttx-configs/aerocore/nsh/defconfig
index e314bf1d82..655dd1406e 100644
--- a/nuttx-configs/aerocore/nsh/defconfig
+++ b/nuttx-configs/aerocore/nsh/defconfig
@@ -268,6 +268,8 @@ CONFIG_STM32_USART=y
 #
 # U[S]ART Configuration
 #
+# Hot fix for lost data
+CONFIG_STM32_RXDMA_BUFFER_SIZE_OVERRIDE=256
 # CONFIG_USART1_RS485 is not set
 CONFIG_USART1_RXDMA=y
 # CONFIG_USART2_RS485 is not set
diff --git a/nuttx-configs/px4-stm32f4discovery/nsh/defconfig b/nuttx-configs/px4-stm32f4discovery/nsh/defconfig
index 03092256e9..7be5399629 100644
--- a/nuttx-configs/px4-stm32f4discovery/nsh/defconfig
+++ b/nuttx-configs/px4-stm32f4discovery/nsh/defconfig
@@ -263,6 +263,8 @@ CONFIG_STM32_USART=y
 #
 # U[S]ART Configuration
 #
+# Hot fix for lost data
+CONFIG_STM32_RXDMA_BUFFER_SIZE_OVERRIDE=256
 # CONFIG_USART2_RS485 is not set
 CONFIG_USART2_RXDMA=y
 # CONFIG_USART6_RS485 is not set
diff --git a/nuttx-configs/px4fmu-v2/nsh/defconfig b/nuttx-configs/px4fmu-v2/nsh/defconfig
index ef9c673785..e828e42be0 100644
--- a/nuttx-configs/px4fmu-v2/nsh/defconfig
+++ b/nuttx-configs/px4fmu-v2/nsh/defconfig
@@ -294,6 +294,8 @@ CONFIG_STM32_USART=y
 #
 # U[S]ART Configuration
 #
+# Hot fix for lost data
+CONFIG_STM32_RXDMA_BUFFER_SIZE_OVERRIDE=256
 # CONFIG_USART1_RS485 is not set
 CONFIG_USART1_RXDMA=y
 # CONFIG_USART2_RS485 is not set