diff --git a/contracts/yield-source/ATokenYieldSource.sol b/contracts/yield-source/ATokenYieldSource.sol
index ac3fb48..1ef67e9 100644
--- a/contracts/yield-source/ATokenYieldSource.sol
+++ b/contracts/yield-source/ATokenYieldSource.sol
@@ -99,6 +99,8 @@ contract ATokenYieldSource is ERC20Upgradeable, IProtocolYieldSource, AssetManag
     transferOwnership(_owner);
 
     __ERC20_init(_name,_symbol);
+    __ReentrancyGuard_init();
+
     require(_decimals > 0, "ATokenYieldSource/decimals-gt-zero");
     _setupDecimals(_decimals);