Index: uspace/lib/libc/generic/malloc.c
===================================================================
--- uspace/lib/libc/generic/malloc.c	(revision 50cfa6cd85f434dea3072039821d26b5943f656d)
+++ uspace/lib/libc/generic/malloc.c	(revision 30885b92b99d4bae510111a9b90bc2b5bf34fe14)
@@ -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);