diff --git a/gcc/fold-const.c b/gcc/fold-const.c
index f8e51ec0a8f..2b5c0655d06 100644
--- a/gcc/fold-const.c
+++ b/gcc/fold-const.c
@@ -1329,7 +1329,7 @@ const_binop (code, arg1, arg2, notrunc)
 
 tree
 size_int (number)
-     unsigned int number;
+     unsigned HOST_WIDE_INT number;
 {
   register tree t;
   /* Type-size nodes already made for small sizes.  */