diff --git a/include/configs/otc570.h b/include/configs/otc570.h
index 8e27ebae9e..4fde012c8f 100644
--- a/include/configs/otc570.h
+++ b/include/configs/otc570.h
@@ -102,6 +102,7 @@
 	at91_set_pio_output(AT91_PIO_PORTB, 4, 0); \
 	at91_set_pio_output(AT91_PIO_PORTB, 5, 0); \
 }
+#define I2C_SOFT_DECLARATIONS
 /* Configure data pin as output */
 #define I2C_ACTIVE		at91_set_pio_output(AT91_PIO_PORTB, 4, 0)
 /* Configure data pin as input */