Index: uspace/lib/ext4/src/extent.c
===================================================================
--- uspace/lib/ext4/src/extent.c	(revision a247c329b4dde84ad9282fdb19dc9c20f4d265a5)
+++ uspace/lib/ext4/src/extent.c	(revision a76e76b19980b8f54d4991e1815154eecce5f12d)
@@ -643,5 +643,5 @@
 
 	uint16_t delete_count = block_count -
-	    (ext4_extent_get_start(path_ptr->extent) - first_fblock);
+	    (first_fblock - ext4_extent_get_start(path_ptr->extent));
 
 	/* Release all blocks */