Index: uspace/lib/ext4/libext4_superblock.c
===================================================================
--- uspace/lib/ext4/libext4_superblock.c	(revision d9812b4a824bbcd7a0fc4efa3fe446a7cf4873ae)
+++ uspace/lib/ext4/libext4_superblock.c	(revision 80bd676ccc4ee37c5f1b5c16dfc1d81deee14d1f)
@@ -1012,5 +1012,5 @@
 {
 	int rc;
-	uint32_t phys_block_size;
+	size_t phys_block_size;
 
 	/* Load physical block size from block device */
@@ -1023,5 +1023,5 @@
 	uint64_t first_block = EXT4_SUPERBLOCK_OFFSET / phys_block_size;
 	/* Compute number of block to write */
-	uint32_t block_count = EXT4_SUPERBLOCK_SIZE / phys_block_size;
+	size_t block_count = EXT4_SUPERBLOCK_SIZE / phys_block_size;
 
 	/* Check alignment */