diff --git a/examples/platforms/utils/logging_rtt.c b/examples/platforms/utils/logging_rtt.c
index 32d79f5af..0c720519d 100644
--- a/examples/platforms/utils/logging_rtt.c
+++ b/examples/platforms/utils/logging_rtt.c
@@ -167,7 +167,7 @@ void utilsLogRttOutput(otLogLevel aLogLevel, otLogRegion aLogRegion, const char
     logString[length++] = '\n';
 
     // Write user log to the RTT memory block.
-    SEGGER_RTT_WriteNoLock(0, logString, length);
+    SEGGER_RTT_WriteNoLock(LOG_RTT_BUFFER_INDEX, logString, length);
 
 exit:
     return;