diff --git a/Marlin/pins.h b/Marlin/pins.h
index 3657675db..c040805b6 100644
--- a/Marlin/pins.h
+++ b/Marlin/pins.h
@@ -456,17 +456,56 @@
 
 #define HAS_DIGIPOTSS (PIN_EXISTS(DIGIPOTSS))
 
+/**
+ * Define SPI Pins: SCK, MISO, MOSI, SS
+ */
+#if defined(__AVR_ATmega168__) || defined(__AVR_ATmega328__) || defined(__AVR_ATmega328P__)
+  #define AVR_SCK_PIN  13
+  #define AVR_MISO_PIN 12
+  #define AVR_MOSI_PIN 11
+  #define AVR_SS_PIN   10
+#elif defined(__AVR_ATmega644__) || defined(__AVR_ATmega644P__) || defined(__AVR_ATmega644PA__) || defined(__AVR_ATmega1284P__)
+  #define AVR_SCK_PIN  7
+  #define AVR_MISO_PIN 6
+  #define AVR_MOSI_PIN 5
+  #define AVR_SS_PIN   4
+#elif defined(__AVR_ATmega1280__) || defined(__AVR_ATmega2560__)
+  #define AVR_SCK_PIN  52
+  #define AVR_MISO_PIN 50
+  #define AVR_MOSI_PIN 51
+  #define AVR_SS_PIN   53
+#elif defined(__AVR_AT90USB1287__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__)
+  #if ENABLED(AT90USBxx_TEENSYPP_ASSIGNMENTS)
+    // Teensy pin assignments
+    #define AVR_SCK_PIN  21
+    #define AVR_MISO_PIN 23
+    #define AVR_MOSI_PIN 22
+    #define AVR_SS_PIN   20
+  #else
+    // Traditional pin assignments
+    #define AVR_SCK_PIN  9
+    #define AVR_MISO_PIN 11
+    #define AVR_MOSI_PIN 10
+    #define AVR_SS_PIN   8
+  #endif
+#elif defined(__AVR_ATmega1281__) || defined(__AVR_ATmega2561__)
+  #define AVR_SCK_PIN  10
+  #define AVR_MISO_PIN 12
+  #define AVR_MOSI_PIN 11
+  #define AVR_SS_PIN   16
+#endif
+
 #ifndef SCK_PIN
-  #define SCK_PIN  SCK
+  #define SCK_PIN  AVR_SCK_PIN
 #endif
 #ifndef MISO_PIN
-  #define MISO_PIN MISO
+  #define MISO_PIN AVR_MISO_PIN
 #endif
 #ifndef MOSI_PIN
-  #define MOSI_PIN MOSI
+  #define MOSI_PIN AVR_MOSI_PIN
 #endif
 #ifndef SS_PIN
-  #define SS_PIN   SS
+  #define SS_PIN   AVR_SS_PIN
 #endif
 
 #endif //__PINS_H