diff --git a/drivers/mmc/mmc.c b/drivers/mmc/mmc.c
index c8eac26bebcbec0c1f1ec67683be28de52245103..dfd3d989dacd835f34a39001dbd0fd4aa3d7c30f 100644
--- a/drivers/mmc/mmc.c
+++ b/drivers/mmc/mmc.c
@@ -481,7 +481,7 @@ static int mmc_enumerate(unsigned int clk, unsigned int bus_width)
 	return mmc_set_ios(clk, bus_width);
 }
 
-size_t mmc_read_blocks(unsigned int lba, uintptr_t buf, size_t size)
+size_t mmc_read_blocks(int lba, uintptr_t buf, size_t size)
 {
 	int ret;
 	unsigned int cmd_idx, cmd_arg;
@@ -548,7 +548,7 @@ size_t mmc_read_blocks(unsigned int lba, uintptr_t buf, size_t size)
 	return size;
 }
 
-size_t mmc_write_blocks(unsigned int lba, const uintptr_t buf, size_t size)
+size_t mmc_write_blocks(int lba, const uintptr_t buf, size_t size)
 {
 	int ret;
 	unsigned int cmd_idx, cmd_arg;
@@ -615,7 +615,7 @@ size_t mmc_write_blocks(unsigned int lba, const uintptr_t buf, size_t size)
 	return size;
 }
 
-size_t mmc_erase_blocks(unsigned int lba, size_t size)
+size_t mmc_erase_blocks(int lba, size_t size)
 {
 	int ret;
 
@@ -661,7 +661,7 @@ static inline void mmc_rpmb_disable(void)
 			PART_CFG_BOOT_PARTITION1_ENABLE);
 }
 
-size_t mmc_rpmb_read_blocks(unsigned int lba, uintptr_t buf, size_t size)
+size_t mmc_rpmb_read_blocks(int lba, uintptr_t buf, size_t size)
 {
 	size_t size_read;
 
@@ -672,7 +672,7 @@ size_t mmc_rpmb_read_blocks(unsigned int lba, uintptr_t buf, size_t size)
 	return size_read;
 }
 
-size_t mmc_rpmb_write_blocks(unsigned int lba, const uintptr_t buf, size_t size)
+size_t mmc_rpmb_write_blocks(int lba, const uintptr_t buf, size_t size)
 {
 	size_t size_written;
 
@@ -683,7 +683,7 @@ size_t mmc_rpmb_write_blocks(unsigned int lba, const uintptr_t buf, size_t size)
 	return size_written;
 }
 
-size_t mmc_rpmb_erase_blocks(unsigned int lba, size_t size)
+size_t mmc_rpmb_erase_blocks(int lba, size_t size)
 {
 	size_t size_erased;
 
diff --git a/include/drivers/mmc.h b/include/drivers/mmc.h
index 65f4bbdc3fd8fac8234c990ec5109b92c1dea6ed..0a513bd645c2e1e1c2ce76908251b1796f72537e 100644
--- a/include/drivers/mmc.h
+++ b/include/drivers/mmc.h
@@ -208,13 +208,12 @@ struct mmc_device_info {
 	enum mmc_device_type	mmc_dev_type;	/* Type of MMC */
 };
 
-size_t mmc_read_blocks(unsigned int lba, uintptr_t buf, size_t size);
-size_t mmc_write_blocks(unsigned int lba, const uintptr_t buf, size_t size);
-size_t mmc_erase_blocks(unsigned int lba, size_t size);
-size_t mmc_rpmb_read_blocks(unsigned int lba, uintptr_t buf, size_t size);
-size_t mmc_rpmb_write_blocks(unsigned int lba, const uintptr_t buf,
-			     size_t size);
-size_t mmc_rpmb_erase_blocks(unsigned int lba, size_t size);
+size_t mmc_read_blocks(int lba, uintptr_t buf, size_t size);
+size_t mmc_write_blocks(int lba, const uintptr_t buf, size_t size);
+size_t mmc_erase_blocks(int lba, size_t size);
+size_t mmc_rpmb_read_blocks(int lba, uintptr_t buf, size_t size);
+size_t mmc_rpmb_write_blocks(int lba, const uintptr_t buf, size_t size);
+size_t mmc_rpmb_erase_blocks(int lba, size_t size);
 int mmc_init(const struct mmc_ops *ops_ptr, unsigned int clk,
 	     unsigned int width, unsigned int flags,
 	     struct mmc_device_info *device_info);