diff --git a/src/add-ons/accelerants/radeon_hd/connector.cpp b/src/add-ons/accelerants/radeon_hd/connector.cpp
index 8ea32e571d..5bcaef8b8e 100644
--- a/src/add-ons/accelerants/radeon_hd/connector.cpp
+++ b/src/add-ons/accelerants/radeon_hd/connector.cpp
@@ -159,8 +159,6 @@ dp_aux_read(uint32 connectorIndex, uint16 address,
 			return ret;
 		else if ((ack & AUX_NATIVE_REPLY_MASK) == AUX_NATIVE_REPLY_DEFER)
 			snooze(400);
-		else if (ret == 0)
-			return -EPROTO;
 		else
 			return B_IO_ERROR;
 	}