diff --git a/src/SparkFun_u-blox_GNSS_Arduino_Library.cpp b/src/SparkFun_u-blox_GNSS_Arduino_Library.cpp
index 7de66a8..f55d351 100644
--- a/src/SparkFun_u-blox_GNSS_Arduino_Library.cpp
+++ b/src/SparkFun_u-blox_GNSS_Arduino_Library.cpp
@@ -3394,7 +3394,7 @@ void SFE_UBLOX_GNSS::checkCallbacks(void)
 // Push (e.g.) RTCM data directly to the module
 // Returns true if all numDataBytes were pushed successfully
 // Warning: this function does not check that the data is valid. It is the user's responsibility to ensure the data is valid before pushing.
-// Default to using a restart between transmissions. Set stop to true to use a stop instead.
+// Default to using a restart between transmissions. But processors like ESP32 seem to need a stop (#30). Set stop to true to use a stop instead.
 // On processors like the ESP32, you can use setI2CTransactionSize to increase the size of each transmission - to e.g. 128 bytes
 boolean SFE_UBLOX_GNSS::pushRawData(uint8_t *dataBytes, size_t numDataBytes, boolean stop)
 {
diff --git a/src/SparkFun_u-blox_GNSS_Arduino_Library.h b/src/SparkFun_u-blox_GNSS_Arduino_Library.h
index 35916ec..42e72eb 100644
--- a/src/SparkFun_u-blox_GNSS_Arduino_Library.h
+++ b/src/SparkFun_u-blox_GNSS_Arduino_Library.h
@@ -641,7 +641,7 @@ public:
 
 	// Push (e.g.) RTCM data directly to the module
 	// Warning: this function does not check that the data is valid. It is the user's responsibility to ensure the data is valid before pushing.
-	// Default to using a restart between transmissions. Set stop to true to use a stop instead.
+	// Default to using a restart between transmissions. But processors like ESP32 seem to need a stop (#30). Set stop to true to use a stop instead.
 	boolean pushRawData(uint8_t *dataBytes, size_t numDataBytes, boolean stop = false);
 
 	// Support for data logging