diff --git a/src/LoRa.cpp b/src/LoRa.cpp
index 94b9e3e..9a55046 100644
--- a/src/LoRa.cpp
+++ b/src/LoRa.cpp
@@ -144,7 +144,9 @@ int LoRaClass::endPacket()
   writeRegister(REG_OP_MODE, MODE_LONG_RANGE_MODE | MODE_TX);
 
   // wait for TX done
-  while((readRegister(REG_IRQ_FLAGS) & IRQ_TX_DONE_MASK) == 0);
+  while ((readRegister(REG_IRQ_FLAGS) & IRQ_TX_DONE_MASK) == 0) {
+    yield();
+  }
 
   // clear IRQ's
   writeRegister(REG_IRQ_FLAGS, IRQ_TX_DONE_MASK);