diff --git a/board/rattler/rattler.c b/board/rattler/rattler.c
index be7977d..ad75c21 100644
--- a/board/rattler/rattler.c
+++ b/board/rattler/rattler.c
@@ -185,7 +185,7 @@
     }
 };
 
-long int initdram(int board_type)
+phys_size_t initdram(int board_type)
 {
 	long int msize = CFG_SDRAM_SIZE;