diff --git a/drivers/video/matrox/i2c-matroxfb.c b/drivers/video/matrox/i2c-matroxfb.c
index 4baab7b..75ee5a1 100644
--- a/drivers/video/matrox/i2c-matroxfb.c
+++ b/drivers/video/matrox/i2c-matroxfb.c
@@ -104,7 +104,9 @@
 };
 
 static int i2c_bus_reg(struct i2c_bit_adapter* b, struct matrox_fb_info* minfo, 
-		unsigned int data, unsigned int clock, const char* name) {
+		unsigned int data, unsigned int clock, const char *name,
+		int class)
+{
 	int err;
 
 	b->minfo = minfo;
@@ -114,6 +116,7 @@
 	snprintf(b->adapter.name, sizeof(b->adapter.name), name,
 		minfo->fbcon.node);
 	i2c_set_adapdata(&b->adapter, b);
+	b->adapter.class = class;
 	b->adapter.algo_data = &b->bac;
 	b->adapter.dev.parent = &ACCESS_FBINFO(pcidev)->dev;
 	b->bac = matrox_i2c_algo_template;
@@ -159,22 +162,29 @@
 	switch (ACCESS_FBINFO(chip)) {
 		case MGA_2064:
 		case MGA_2164:
-			err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1B_DATA, DDC1B_CLK, "DDC:fb%u #0");
+			err = i2c_bus_reg(&m2info->ddc1, minfo,
+					  DDC1B_DATA, DDC1B_CLK,
+					  "DDC:fb%u #0", I2C_CLASS_DDC);
 			break;
 		default:
-			err = i2c_bus_reg(&m2info->ddc1, minfo, DDC1_DATA, DDC1_CLK, "DDC:fb%u #0");
+			err = i2c_bus_reg(&m2info->ddc1, minfo,
+					  DDC1_DATA, DDC1_CLK,
+					  "DDC:fb%u #0", I2C_CLASS_DDC);
 			break;
 	}
 	if (err)
 		goto fail_ddc1;
 	if (ACCESS_FBINFO(devflags.dualhead)) {
-		err = i2c_bus_reg(&m2info->ddc2, minfo, DDC2_DATA, DDC2_CLK, "DDC:fb%u #1");
+		err = i2c_bus_reg(&m2info->ddc2, minfo,
+				  DDC2_DATA, DDC2_CLK,
+				  "DDC:fb%u #1", I2C_CLASS_DDC);
 		if (err == -ENODEV) {
 			printk(KERN_INFO "i2c-matroxfb: VGA->TV plug detected, DDC unavailable.\n");
 		} else if (err)
 			printk(KERN_INFO "i2c-matroxfb: Could not register secondary output i2c bus. Continuing anyway.\n");
 		/* Register maven bus even on G450/G550 */
-		err = i2c_bus_reg(&m2info->maven, minfo, MAT_DATA, MAT_CLK, "MAVEN:fb%u");
+		err = i2c_bus_reg(&m2info->maven, minfo,
+				  MAT_DATA, MAT_CLK, "MAVEN:fb%u", 0);
 		if (err)
 			printk(KERN_INFO "i2c-matroxfb: Could not register Maven i2c bus. Continuing anyway.\n");
 	}