diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h
index c630f7370ef8b8acfbe5ffeb71ded8d0efb1a38a..97a1342f339391325c89d2e196883dd7e9120903 100644
--- a/cores/arduino/Arduino.h
+++ b/cores/arduino/Arduino.h
@@ -116,7 +116,7 @@ void loop( void ) ;
 
 #if (ARDUINO_SAMD_VARIANT_COMPLIANCE >= 10605)
 // Interrupts
-#define digitalPinToInterrupt(P)   ( g_APinDescription[P].ulExtInt )
+#define digitalPinToInterrupt(P)   ( P )
 #endif
 
 // USB Device