diff --git a/contracts/ReentrancyGuard.sol b/contracts/ReentrancyGuard.sol
new file mode 100644
index 00000000000..7238d077b63
--- /dev/null
+++ b/contracts/ReentrancyGuard.sol
@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+contract ReentrancyGuard {
+    // Deprecated: This contract lacks transient storage support. Consider migrating to ReentrancyGuardTransient.
+    bool private _notEntered;
+
+    constructor () {
+        _notEntered = true;
+    }
+
+    modifier nonReentrant() {
+        require(_notEntered, "ReentrancyGuard: reentrant call");
+        _notEntered = false;
+        _;
+        _notEntered = true;
+    }
+}
diff --git a/contracts/ReentrancyGuardTransient.sol b/contracts/ReentrancyGuardTransient.sol
new file mode 100644
index 00000000000..2bc204ec96e
--- /dev/null
+++ b/contracts/ReentrancyGuardTransient.sol
@@ -0,0 +1,16 @@
+pragma solidity ^0.8.0;
+
+contract ReentrancyGuardTransient {
+    bool private _notEntered;
+
+    constructor () {
+        _notEntered = true;
+    }
+
+    modifier nonReentrant() {
+        require(_notEntered, "ReentrancyGuard: reentrant call");
+        _notEntered = false;
+        _;
+        _notEntered = true;
+    }
+}