diff --git a/cores/arduino/UART0.cpp b/cores/arduino/UART0.cpp
index b8f1f34c..522b6844 100644
--- a/cores/arduino/UART0.cpp
+++ b/cores/arduino/UART0.cpp
@@ -51,7 +51,7 @@ ISR(HWSERIAL0_DRE_VECTOR)
   Serial._tx_data_empty_irq();
 }
 #else
-#error "Don't know what the Data Received interrupt vector is called for Serial"
+#error "Don't know what the Data Register Empty interrupt vector is called for Serial"
 #endif
 
 #if defined(HWSERIAL0)