diff --git a/board/atmel/atstk1000/atstk1000.c b/board/atmel/atstk1000/atstk1000.c
index 33bdba6..6371e2d 100644
--- a/board/atmel/atstk1000/atstk1000.c
+++ b/board/atmel/atstk1000/atstk1000.c
@@ -90,7 +90,7 @@
 	return 0;
 }
 
-long int initdram(int board_type)
+phys_size_t initdram(int board_type)
 {
 	unsigned long expected_size;
 	unsigned long actual_size;