diff --git a/CHANGELOG.md b/CHANGELOG.md
index f6bd3ca12..440e61ca7 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,7 @@
 - [x] `IexecPoco2Delegate.sol`
 
 ### Features
+- Re-use variable in `IexecPoco2Delegate` in `contribute(...)` function. (#168)
 - Remove unnecessary back and forth transfers in `IexecPoco2Delegate` happening during `claim(..)`. (#167)
 - Remove references to blockscout v5. (#161)
 - Migrate integration test files to Typescript & Hardhat:
diff --git a/contracts/modules/delegates/IexecPoco2Delegate.sol b/contracts/modules/delegates/IexecPoco2Delegate.sol
index 893efcc1d..a24e9b632 100644
--- a/contracts/modules/delegates/IexecPoco2Delegate.sol
+++ b/contracts/modules/delegates/IexecPoco2Delegate.sol
@@ -168,7 +168,7 @@ contract IexecPoco2Delegate is IexecPoco2, DelegateBase, IexecEscrow, SignatureV
         uint256 delta = Math.max(group, 1) * weight - group;
 
         contribution.weight = Math.log2(weight);
-        consensus.group[_resultHash] = consensus.group[_resultHash] + delta;
+        consensus.group[_resultHash] = group + delta;
         consensus.total = consensus.total + delta;
 
         // Check consensus