diff --git a/targets/TARGET_Maxim/TARGET_MAX32630/PeripheralPins.c b/targets/TARGET_Maxim/TARGET_MAX32630/PeripheralPins.c
index 99ab2b16ef..2b5bb0f5ab 100644
--- a/targets/TARGET_Maxim/TARGET_MAX32630/PeripheralPins.c
+++ b/targets/TARGET_Maxim/TARGET_MAX32630/PeripheralPins.c
@@ -119,7 +119,7 @@ const PinMap PinMap_UART_RTS[] = {
     { P0_2, UART_0, (int)&((pin_function_t){&MXC_IOMAN->uart0_req, &MXC_IOMAN->uart0_ack, ((uint32_t)(IOMAN_MAP_B << MXC_F_IOMAN_UART0_REQ_RTS_MAP_POS) | MXC_F_IOMAN_UART0_REQ_RTS_IO_REQ), (MXC_F_IOMAN_UART0_ACK_RTS_MAP | MXC_F_IOMAN_UART0_ACK_RTS_IO_ACK)}) },
     { P2_2, UART_1, (int)&((pin_function_t){&MXC_IOMAN->uart1_req, &MXC_IOMAN->uart1_ack, ((uint32_t)(IOMAN_MAP_B << MXC_F_IOMAN_UART1_REQ_RTS_MAP_POS) | MXC_F_IOMAN_UART1_REQ_RTS_IO_REQ), (MXC_F_IOMAN_UART1_ACK_RTS_MAP | MXC_F_IOMAN_UART1_ACK_RTS_IO_ACK)}) },
     { P3_2, UART_2, (int)&((pin_function_t){&MXC_IOMAN->uart2_req, &MXC_IOMAN->uart2_ack, ((uint32_t)(IOMAN_MAP_B << MXC_F_IOMAN_UART2_REQ_RTS_MAP_POS) | MXC_F_IOMAN_UART2_REQ_RTS_IO_REQ), (MXC_F_IOMAN_UART2_ACK_RTS_MAP | MXC_F_IOMAN_UART2_ACK_RTS_IO_ACK)}) },
-    { P5_5, UART_3, (int)&((pin_function_t){&MXC_IOMAN->uart3_req, &MXC_IOMAN->uart3_ack, ((uint32_t)(IOMAN_MAP_A << MXC_F_IOMAN_UART3_REQ_RTS_MAP_POS) | MXC_F_IOMAN_UART3_REQ_RTS_IO_REQ), (MXC_F_IOMAN_UART3_ACK_RTS_MAP | MXC_F_IOMAN_UART3_ACK_RTS_IO_ACK)}) },
+    { P5_5, UART_3, (int)&((pin_function_t){&MXC_IOMAN->uart3_req, &MXC_IOMAN->uart3_ack, ((uint32_t)(IOMAN_MAP_B << MXC_F_IOMAN_UART3_REQ_RTS_MAP_POS) | MXC_F_IOMAN_UART3_REQ_RTS_IO_REQ), (MXC_F_IOMAN_UART3_ACK_RTS_MAP | MXC_F_IOMAN_UART3_ACK_RTS_IO_ACK)}) },
     { NC,   NC,     0 }
 };