diff --git a/kernel/busses/i2c-viapro.c b/kernel/busses/i2c-viapro.c
index 83df116f..cf4bd3a6 100644
--- a/kernel/busses/i2c-viapro.c
+++ b/kernel/busses/i2c-viapro.c
@@ -227,8 +227,8 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
 			len = data->block[0];
 			if (len < 0)
 				len = 0;
-			if (len > 32)
-				len = 32;
+			if (len > I2C_SMBUS_BLOCK_MAX)
+				len = I2C_SMBUS_BLOCK_MAX;
 			outb_p(len, SMBHSTDAT0);
 			i = inb_p(SMBHSTCNT);	/* Reset SMBBLKDAT */
 			for (i = 1; i <= len; i++)
@@ -265,8 +265,8 @@ static s32 vt596_access(struct i2c_adapter *adap, u16 addr,
 		break;
 	case VT596_BLOCK_DATA:
 		data->block[0] = inb_p(SMBHSTDAT0);
-		if (data->block[0] > 32)
-			data->block[0] = 32;
+		if (data->block[0] > I2C_SMBUS_BLOCK_MAX)
+			data->block[0] = I2C_SMBUS_BLOCK_MAX;
 		i = inb_p(SMBHSTCNT);	/* Reset SMBBLKDAT */
 		for (i = 1; i <= data->block[0]; i++)
 			data->block[i] = inb_p(SMBBLKDAT);