diff --git a/Usb.cpp b/Usb.cpp
index d43d63b6..d599c216 100644
--- a/Usb.cpp
+++ b/Usb.cpp
@@ -382,7 +382,7 @@ uint8_t USB::dispatchPkt(uint8_t token, uint8_t ep, uint16_t nak_limit) {
         uint16_t nak_count = 0;
 
         while((int32_t)((uint32_t)millis() - timeout) < 0L) {
-#ifdef ESP8266
+#if defined(ESP8266) || defined(ESP32)
                         yield(); // needed in order to reset the watchdog timer on the ESP8266
 #endif
                 regWr(rHXFR, (token | ep)); //launch the transfer
@@ -390,7 +390,7 @@ uint8_t USB::dispatchPkt(uint8_t token, uint8_t ep, uint16_t nak_limit) {
 
                 while((int32_t)((uint32_t)millis() - timeout) < 0L) //wait for transfer completion
                 {
-#ifdef ESP8266
+#if defined(ESP8266) || defined(ESP32)
                         yield(); // needed in order to reset the watchdog timer on the ESP8266
 #endif
                         tmpdata = regRd(rHIRQ);