Index: uspace/lib/ext4/src/extent.c
===================================================================
--- uspace/lib/ext4/src/extent.c	(revision f78308153763110781d49aaa03881ea1bc9d48fb)
+++ uspace/lib/ext4/src/extent.c	(revision e0e612b4a7ecb09b6016f7d622789dcc33cb26e4)
@@ -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 */