diff --git a/drivers/mmc/cv1800b_sdhci.c b/drivers/mmc/cv1800b_sdhci.c
index 2275c53..9af6b97 100644
--- a/drivers/mmc/cv1800b_sdhci.c
+++ b/drivers/mmc/cv1800b_sdhci.c
@@ -42,7 +42,7 @@
 	for (tap = 0; tap < TUNE_MAX_PHCODE; tap++) {
 		cv1800b_set_tap_delay(host, tap);
 
-		if (mmc_send_tuning(host->mmc, opcode, NULL)) {
+		if (mmc_send_tuning(host->mmc, opcode)) {
 			current_size = 0;
 		} else {
 			current_size++;