diff --git a/drivers/block/systemace.c b/drivers/block/systemace.c
index fdf75b5..b974e80 100644
--- a/drivers/block/systemace.c
+++ b/drivers/block/systemace.c
@@ -69,8 +69,9 @@
 	return in16(base + off);
 }
 
-static unsigned long systemace_read(int dev, unsigned long start,
-					lbaint_t blkcnt, void *buffer);
+static unsigned long systemace_read(block_dev_desc_t *block_dev,
+				    unsigned long start, lbaint_t blkcnt,
+				    void *buffer);
 
 static block_dev_desc_t systemace_dev = { 0 };
 
@@ -136,8 +137,9 @@
  * the dev_desc) to read blocks of data. The return value is the
  * number of blocks read. A zero return indicates an error.
  */
-static unsigned long systemace_read(int dev, unsigned long start,
-					lbaint_t blkcnt, void *buffer)
+static unsigned long systemace_read(block_dev_desc_t *block_dev,
+				    unsigned long start, lbaint_t blkcnt,
+				    void *buffer)
 {
 	int retry;
 	unsigned blk_countdown;