diff --git a/3rd-party/segger-rtt/SEGGER_RTT_Syscalls_GCC.c b/3rd-party/segger-rtt/SEGGER_RTT_Syscalls_GCC.c
index 6015cb303..6ec523328 100644
--- a/3rd-party/segger-rtt/SEGGER_RTT_Syscalls_GCC.c
+++ b/3rd-party/segger-rtt/SEGGER_RTT_Syscalls_GCC.c
@@ -96,7 +96,7 @@ _ssize_t _write_r(struct _reent *r, int file, const void *ptr, size_t len);
 *   including stdout.
 *   Write data via RTT.
 */
-_ssize_t _write(int file, const void *ptr, size_t len) {
+_ssize_t __attribute__((weak)) _write(int file, const void *ptr, size_t len) {
   (void) file;  /* Not used, avoid warning */
   SEGGER_RTT_Write(0, ptr, len);
   return len;
@@ -112,7 +112,7 @@ _ssize_t _write(int file, const void *ptr, size_t len) {
 *   including stdout.
 *   Write data via RTT.
 */
-_ssize_t _write_r(struct _reent *r, int file, const void *ptr, size_t len) {
+_ssize_t __attribute__((weak)) _write_r(struct _reent *r, int file, const void *ptr, size_t len) {
   (void) file;  /* Not used, avoid warning */
   (void) r;     /* Not used, avoid warning */
   SEGGER_RTT_Write(0, ptr, len);