diff --git a/configs/stm3210e-eval/ostest/defconfig b/configs/stm3210e-eval/ostest/defconfig
index 8822f6de904..49559dc1a06 100755
--- a/configs/stm3210e-eval/ostest/defconfig
+++ b/configs/stm3210e-eval/ostest/defconfig
@@ -112,27 +112,50 @@ CONFIG_STM32_BUILDROOT=y
 CONFIG_USART1_DISABLE=n
 CONFIG_USART2_DISABLE=y
 CONFIG_USART3_DISABLE=y
+CONFIG_USART4_DISABLE=y
+CONFIG_USART5_DISABLE=y
+
 CONFIG_USART1_SERIAL_CONSOLE=y
 CONFIG_USART2_SERIAL_CONSOLE=n
 CONFIG_USART3_SERIAL_CONSOLE=n
+CONFIG_USART4_SERIAL_CONSOLE=n
+CONFIG_USART5_SERIAL_CONSOLE=n
+
 CONFIG_USART1_TXBUFSIZE=256
 CONFIG_USART2_TXBUFSIZE=256
 CONFIG_USART3_TXBUFSIZE=256
+CONFIG_USART4_TXBUFSIZE=256
+CONFIG_USART5_TXBUFSIZE=256
+
 CONFIG_USART1_RXBUFSIZE=256
 CONFIG_USART2_RXBUFSIZE=256
 CONFIG_USART3_RXBUFSIZE=256
+CONFIG_USART4_RXBUFSIZE=256
+CONFIG_USART5_RXBUFSIZE=256
+
 CONFIG_USART1_BAUD=115200
 CONFIG_USART2_BAUD=115200
 CONFIG_USART3_BAUD=115200
+CONFIG_USART4_BAUD=115200
+CONFIG_USART5_BAUD=115200
+
 CONFIG_USART1_BITS=8
 CONFIG_USART2_BITS=8
 CONFIG_USART3_BITS=8
+CONFIG_USART4_BITS=8
+CONFIG_USART5_BITS=8
+
 CONFIG_USART1_PARITY=0
 CONFIG_USART2_PARITY=0
 CONFIG_USART3_PARITY=0
+CONFIG_USART4_PARITY=0
+CONFIG_USART5_PARITY=0
+
 CONFIG_USART1_2STOP=0
 CONFIG_USART2_2STOP=0
 CONFIG_USART3_2STOP=0
+CONFIG_USART4_2STOP=0
+CONFIG_USART5_2STOP=0
 
 #
 # STM32F103Z specific SSI device driver settings