diff --git a/contract/src/lib.rs b/contract/src/lib.rs
index 7b58725..f15f62c 100644
--- a/contract/src/lib.rs
+++ b/contract/src/lib.rs
@@ -5,3 +5,5 @@
 mod main;
 #[cfg(feature = "native-simulator")]
 pub use main::program_entry;
+
+extern crate alloc;