diff --git a/hw/xfree86/i2c/xf86i2c.c b/hw/xfree86/i2c/xf86i2c.c
index 55a6cb059..77e3c2634 100644
--- a/hw/xfree86/i2c/xf86i2c.c
+++ b/hw/xfree86/i2c/xf86i2c.c
@@ -818,6 +818,7 @@ xf86I2CBusInit(I2CBusPtr b)
 	    if (b->I2CPutByte == NULL ||
 	        b->I2CGetByte == NULL ||
 	        b->I2CAddress == NULL ||
+	        b->I2CStart   == NULL ||
 	        b->I2CStop    == NULL)
 	        return FALSE;
         } else { 
@@ -825,6 +826,7 @@ xf86I2CBusInit(I2CBusPtr b)
 	    b->I2CGetByte = I2CGetByte;
 	    b->I2CAddress = I2CAddress;
 	    b->I2CStop    = I2CStop;
+	    b->I2CStart   = I2CStart;
         }
      }
 
diff --git a/hw/xfree86/i2c/xf86i2c.h b/hw/xfree86/i2c/xf86i2c.h
index b6ef41feb..099406e8f 100644
--- a/hw/xfree86/i2c/xf86i2c.h
+++ b/hw/xfree86/i2c/xf86i2c.h
@@ -27,6 +27,7 @@ typedef struct _I2CBusRec {
 
     /* Look at the generic routines to see how these functions should behave. */
 
+    Bool        	(*I2CStart)  (I2CBusPtr b, int timeout);
     Bool        	(*I2CAddress)(I2CDevPtr d, I2CSlaveAddr);
     void        	(*I2CStop)   (I2CDevPtr d);
     Bool		(*I2CPutByte)(I2CDevPtr d, I2CByte data);