diff --git a/drivers/block/systemace.c b/drivers/block/systemace.c
index 247cf06..80076b4 100644
--- a/drivers/block/systemace.c
+++ b/drivers/block/systemace.c
@@ -83,7 +83,7 @@
 }
 
 static unsigned long systemace_read(int dev, unsigned long start,
-				    unsigned long blkcnt, void *buffer);
+					lbaint_t blkcnt, void *buffer);
 
 static block_dev_desc_t systemace_dev = { 0 };
 
@@ -149,7 +149,7 @@
  * number of blocks read. A zero return indicates an error.
  */
 static unsigned long systemace_read(int dev, unsigned long start,
-				    unsigned long blkcnt, void *buffer)
+					lbaint_t blkcnt, void *buffer)
 {
 	int retry;
 	unsigned blk_countdown;