diff --git a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/reloc_vector_table.c b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/reloc_vector_table.c
index 53daa7e4ff..851fa5510a 100644
--- a/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/reloc_vector_table.c
+++ b/targets/TARGET_NORDIC/TARGET_NRF5x/TARGET_NRF52/reloc_vector_table.c
@@ -39,6 +39,8 @@
 #include "nrf.h"
 #include "cmsis_nvic.h"
 #include "stdint.h"
+#include "PinNames.h"
+#include "hal/gpio_api.h"
 
 #if defined(SOFTDEVICE_PRESENT)
 #include "nrf_sdm.h"
@@ -110,3 +112,13 @@ void nrf_reloc_vector_table(void)
     SCB->VTOR = (uint32_t) nrf_dispatch_vector;    
 #endif
 }
+
+#if (STDIO_UART_RTS != NC)
+void mbed_sdk_init(void)
+{
+	gpio_t rts;
+	gpio_init_out(&rts, STDIO_UART_RTS);
+	/* Set STDIO_UART_RTS as gpio driven low */
+	gpio_write(&rts, 0);
+}
+#endif