diff --git a/sysmoOCTSIM/atmel_start_pins.h b/sysmoOCTSIM/atmel_start_pins.h
index 0264736..7cbaed5 100644
--- a/sysmoOCTSIM/atmel_start_pins.h
+++ b/sysmoOCTSIM/atmel_start_pins.h
@@ -31,6 +31,7 @@
 #define SIM5_INT GPIO(GPIO_PORTA, 3)
 #define SIM0_IO GPIO(GPIO_PORTA, 4)
 #define SIM2_IO GPIO(GPIO_PORTA, 9)
+#define RMII_CLOCK GPIO(GPIO_PORTA, 10)
 #define SIMCLK_20MHZ GPIO(GPIO_PORTA, 11)
 #define SIM1_IO GPIO(GPIO_PORTA, 16)
 #define VB0 GPIO(GPIO_PORTA, 20)