diff --git a/board/o2dnt/o2dnt.c b/board/o2dnt/o2dnt.c
index 81a2700..a4eed3a 100644
--- a/board/o2dnt/o2dnt.c
+++ b/board/o2dnt/o2dnt.c
@@ -67,7 +67,7 @@
  *            use of CFG_SDRAM_BASE. The code does not work if CFG_SDRAM_BASE
  *            is something else than 0x00000000.
  */
-long int initdram (int board_type)
+phys_size_t initdram (int board_type)
 {
 	ulong dramsize = 0;
 	ulong dramsize2 = 0;