diff --git a/IOTeensy.cpp b/IOTeensy.cpp
index 1cd90f9..b59e3a4 100644
--- a/IOTeensy.cpp
+++ b/IOTeensy.cpp
@@ -20,10 +20,8 @@
 #include "Globals.h"
 #include "IO.h"
 
-#if defined(__MK20DX256__) || defined(__MK66FX1M0__)
+#if defined(__MK20DX256__) || defined(__MK64FX512__) || defined(__MK66FX1M0__)
 
-// A Teensy 3.1/3.2
-#if defined(__MK20DX256__)
 #define PIN_LED                13
 #define PIN_COS                52
 #define PIN_PTT                23
@@ -35,20 +33,6 @@
 #define PIN_ADC                5        // A0
 #define PIN_RSSI               8        // A2
 
-// A Teensy 3.6
-#elif defined(__MK66FX1M0__)
-#define PIN_LED                13
-#define PIN_COS                52
-#define PIN_PTT                23
-#define PIN_COSLED             22
-#define PIN_DSTAR              9
-#define PIN_DMR                8
-#define PIN_YSF                7
-#define PIN_P25                6
-#define PIN_ADC                5        // A0
-#define PIN_RSSI               8        // A2
-#endif
-
 #define PDB_CH0C1_TOS 0x0100
 #define PDB_CH0C1_EN  0x01
 
@@ -231,4 +215,3 @@ void CIO::setP25Int(bool on)
 }
 
 #endif
-