diff --git a/board/cpc45/cpc45.c b/board/cpc45/cpc45.c
index 79eb473..f4e867c 100644
--- a/board/cpc45/cpc45.c
+++ b/board/cpc45/cpc45.c
@@ -61,7 +61,7 @@
 	return 0;
 }
 
-long int initdram (int board_type)
+phys_size_t initdram (int board_type)
 {
 	int m, row, col, bank, i, ref;
 	unsigned long start, end;