readme: fix example

1 files changed, 2 insertions, 0 deletions

diff --git a/README.md b/README.md
index ccfc0ea..458d2e2 100644
--- a/README.md
+++ b/README.md
@@ -445,6 +445,8 @@ This will do multiple allocations:
 
 To facilitate memory handling, consider using an arena allocator like this:
 ```zig
+const allocator = std.heap.page_allocator; // Use a suitable allocator
+
 var arena = std.heap.ArenaAllocator.init(allocator);
 defer arena.deinit();