diff --git a/tornado/fw/mmc.c b/tornado/fw/mmc.c
index 9893de6..7255062 100644
--- a/tornado/fw/mmc.c
+++ b/tornado/fw/mmc.c
@@ -105,12 +105,12 @@ static bool mmc_wait(void)
 }
 
 
-bool mmc_begin_read(uint32_t sector)
+bool mmc_begin_read(uint32_t addr)
 {
 	uint8_t res;
 
 	mmc_begin();
-	mmc_command(MMC_READ_SINGLE_BLOCK, sector);
+	mmc_command(MMC_READ_SINGLE_BLOCK, addr);
 	res = mmc_r1();
 	DEBUG("mmc_begin_read: r1 = 0x%02x", res);
 	if (res) {
@@ -135,12 +135,12 @@ bool mmc_end_read(void)
 }
 
 
-bool mmc_begin_write(uint32_t sector)
+bool mmc_begin_write(uint32_t addr)
 {
 	uint8_t res;
 
 	mmc_begin();
-	mmc_command(MMC_WRITE_BLOCK, sector);
+	mmc_command(MMC_WRITE_BLOCK, addr);
 	res = mmc_r1();
 	DEBUG("mmc_begin_write: r1 = 0x%02x", res);
 	if (res) {
diff --git a/tornado/fw/mmc.h b/tornado/fw/mmc.h
index dd03a5d..28c3e69 100644
--- a/tornado/fw/mmc.h
+++ b/tornado/fw/mmc.h
@@ -21,11 +21,11 @@
 #define	MMC_BLOCK	512
 
 
-bool mmc_begin_read(uint32_t sector);
+bool mmc_begin_read(uint32_t addr);
 uint8_t mmc_read(void);
 bool mmc_end_read(void);
 
-bool mmc_begin_write(uint32_t sector);
+bool mmc_begin_write(uint32_t addr);
 void mmc_write(uint8_t data);
 bool mmc_end_write(void);