diff --git a/src/SparkFun_u-blox_GNSS_Arduino_Library.cpp b/src/SparkFun_u-blox_GNSS_Arduino_Library.cpp
index 5b32b87..20df53c 100644
--- a/src/SparkFun_u-blox_GNSS_Arduino_Library.cpp
+++ b/src/SparkFun_u-blox_GNSS_Arduino_Library.cpp
@@ -3312,6 +3312,8 @@ void SFE_UBLOX_GNSS::processUBXpacket(ubxPacket *msg)
 
         packetUBXRXMPMPmessage->callbackData->checksumA = msg->checksumA;
         packetUBXRXMPMPmessage->callbackData->checksumB = msg->checksumB;
+        
+        packetUBXRXMPMPmessage->automaticFlags.flags.bits.callbackCopyValid = true; // Mark the data as valid
       }
     }
     else if (msg->id == UBX_RXM_SFRBX)