diff --git a/fs/reiserfs/fix_node.c b/fs/reiserfs/fix_node.c
index fefe87e1c099..6c13a8d9a73c 100644
--- a/fs/reiserfs/fix_node.c
+++ b/fs/reiserfs/fix_node.c
@@ -2252,8 +2252,9 @@ static int get_virtual_node_size(struct super_block *sb, struct buffer_head *bh)
 
 	return sizeof(struct virtual_node) +
 	    max(max_num_of_items * sizeof(struct virtual_item),
-		sizeof(struct virtual_item) + sizeof(struct direntry_uarea) +
-		(max_num_of_entries - 1) * sizeof(__u16));
+		sizeof(struct virtual_item) +
+		struct_size_t(struct direntry_uarea, entry_sizes,
+			      max_num_of_entries));
 }
 
 /*
diff --git a/fs/reiserfs/reiserfs.h b/fs/reiserfs/reiserfs.h
index 55e85256aae8..b81749492ef9 100644
--- a/fs/reiserfs/reiserfs.h
+++ b/fs/reiserfs/reiserfs.h
@@ -2373,7 +2373,7 @@ struct virtual_node {
 struct direntry_uarea {
 	int flags;
 	__u16 entry_count;
-	__u16 entry_sizes[1];
+	__u16 entry_sizes[];
 } __attribute__ ((__packed__));
 
 /***************************************************************************