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-rw-r--r--zkvms/zkwasm/guest/src/lib.rs3
1 files changed, 3 insertions, 0 deletions
diff --git a/zkvms/zkwasm/guest/src/lib.rs b/zkvms/zkwasm/guest/src/lib.rs
index c7c0572..219c3a4 100644
--- a/zkvms/zkwasm/guest/src/lib.rs
+++ b/zkvms/zkwasm/guest/src/lib.rs
@@ -3,6 +3,9 @@ use wrapper_macro::{ make_wrapper, read };
// https://github.com/DelphinusLab/zkWasm-rust/blob/main/src/lib.rs
use zkwasm_rust_sdk::{require, wasm_input, wasm_output};
+#[cfg(not(no_std))]
+use std::collections::*;
+
fn read_private() -> u64 {
unsafe { wasm_input(0) }
}