diff --git a/contracts/Contribution.sol b/contracts/Contribution.sol
index 0ac60fc..8c64106 100644
--- a/contracts/Contribution.sol
+++ b/contracts/Contribution.sol
@@ -152,7 +152,7 @@ contract Contribution is Initializable {
 
   function add(uint32 amount, uint32 contributorId, bytes32 hashDigest, uint8 hashFunction, uint8 hashSize) public {
     //require(canPerform(msg.sender, ADD_CONTRIBUTION_ROLE, new uint32[](0)), 'nope');
-    require(balanceOf(msg.sender) > 0, "Must have Kredits");
+    require(balanceOf(msg.sender) > 0 || contributorContract.addressIsCore(msg.sender), 'must have kredits or core');
     uint32 contributionId = contributionsCount + 1;
     ContributionData storage c = contributions[contributionId];
     c.exists = true;