diff --git a/src/mavsdk/plugins/rtk/rtk_impl.cpp b/src/mavsdk/plugins/rtk/rtk_impl.cpp
index c6b793dd3d..f7e0bb6045 100644
--- a/src/mavsdk/plugins/rtk/rtk_impl.cpp
+++ b/src/mavsdk/plugins/rtk/rtk_impl.cpp
@@ -57,7 +57,7 @@ Rtk::Result RtkImpl::send_rtcm_data(Rtk::RtcmData rtcm_data)
             &message,
             flags,
             static_cast<uint8_t>(std::min(field_len, bytes_to_send)),
-            reinterpret_cast<const uint8_t*>(rtcm_data.data.c_str()));
+            reinterpret_cast<const uint8_t*>(rtcm_data.data.c_str() + (i * field_len)));
 
         if (!_parent->send_message(message)) {
             ++_sequence;