diff --git a/src/radeon_output.c b/src/radeon_output.c
index 72addef..8802aa8 100644
--- a/src/radeon_output.c
+++ b/src/radeon_output.c
@@ -223,7 +223,7 @@ radeon_do_ddc(xf86OutputPtr output)
     if (radeon_output->pI2CBus) {
 	DDCReg = radeon_output->ddc_i2c.mask_clk_reg;
 
-	if (IS_AVIVO_VARIANT) {
+	if (info->IsAtomBios) {
 	    AVIVOI2CDoLock(output, AVIVO_I2C_ENABLE);
 	    MonInfo = xf86OutputGetEDID(output, radeon_output->pI2CBus);
 	    AVIVOI2CDoLock(output, AVIVO_I2C_DISABLE);