diff --git a/polkadot/src/main.rs b/polkadot/src/main.rs
index 14d62fbb9a..13c17df851 100644
--- a/polkadot/src/main.rs
+++ b/polkadot/src/main.rs
@@ -20,6 +20,11 @@
 
 use color_eyre::eyre;
 
+/// Global allocator. Changing it to another allocator will require changing
+/// `memory_stats::MemoryAllocationTracker`.
+#[global_allocator]
+pub static ALLOC: tikv_jemallocator::Jemalloc = tikv_jemallocator::Jemalloc;
+
 fn main() -> eyre::Result<()> {
 	color_eyre::install()?;
 	polkadot_cli::run()?;