Index: uspace/lib/libc/generic/malloc.c
===================================================================
--- uspace/lib/libc/generic/malloc.c	(revision 6ac14a70ed101ee9fa8379a5f9ef15a38f08aec5)
+++ uspace/lib/libc/generic/malloc.c	(revision 646b9960f45edec2b83f4adb3bc5a501c2b28e9b)
@@ -411,5 +411,5 @@
 			block_check(next_head);
 			block_init(head, head->size + next_head->size, false);
-			split_mark(head, ALIGN_UP(size, BASE_ALIGN));
+			split_mark(head, real_size);
 			
 			ptr = ((void *) head) + sizeof(heap_block_head_t);