diff --git a/src/main/java/org/qortal/block/BlockChain.java b/src/main/java/org/qortal/block/BlockChain.java
index 6182bd1d..a2fa8804 100644
--- a/src/main/java/org/qortal/block/BlockChain.java
+++ b/src/main/java/org/qortal/block/BlockChain.java
@@ -76,7 +76,8 @@ public class BlockChain {
 		disableReferenceTimestamp,
 		increaseOnlineAccountsDifficultyTimestamp,
 		onlineAccountMinterLevelValidationHeight,
-		selfSponsorshipAlgoV1Height;
+		selfSponsorshipAlgoV1Height,
+		feeValidationFixTimestamp;
 	}
 
 	// Custom transaction fees
@@ -501,6 +502,10 @@ public class BlockChain {
 		return this.featureTriggers.get(FeatureTrigger.onlineAccountMinterLevelValidationHeight.name()).intValue();
 	}
 
+	public long getFeeValidationFixTimestamp() {
+		return this.featureTriggers.get(FeatureTrigger.feeValidationFixTimestamp.name()).longValue();
+	}
+
 
 	// More complex getters for aspects that change by height or timestamp
 
diff --git a/src/main/java/org/qortal/transaction/RewardShareTransaction.java b/src/main/java/org/qortal/transaction/RewardShareTransaction.java
index 3b9a251e..d4d2434c 100644
--- a/src/main/java/org/qortal/transaction/RewardShareTransaction.java
+++ b/src/main/java/org/qortal/transaction/RewardShareTransaction.java
@@ -164,8 +164,13 @@ public class RewardShareTransaction extends Transaction {
 		}
 
 		// Check creator has enough funds
-		if (creator.getConfirmedBalance(Asset.QORT) < this.rewardShareTransactionData.getFee())
-			return ValidationResult.NO_BALANCE;
+		if (this.rewardShareTransactionData.getTimestamp() >= BlockChain.getInstance().getFeeValidationFixTimestamp())
+			if (creator.getConfirmedBalance(Asset.QORT) < this.rewardShareTransactionData.getFee())
+				return ValidationResult.NO_BALANCE;
+
+		else if (!(isRecipientAlsoMinter && existingRewardShareData == null))
+			if (creator.getConfirmedBalance(Asset.QORT) < this.rewardShareTransactionData.getFee())
+				return ValidationResult.NO_BALANCE;
 
 		return ValidationResult.OK;
 	}
diff --git a/src/main/resources/blockchain.json b/src/main/resources/blockchain.json
index 7e4497fe..3969e944 100644
--- a/src/main/resources/blockchain.json
+++ b/src/main/resources/blockchain.json
@@ -83,7 +83,8 @@
 		"disableReferenceTimestamp": 1655222400000,
 		"increaseOnlineAccountsDifficultyTimestamp": 9999999999999,
 		"onlineAccountMinterLevelValidationHeight": 1092000,
-		"selfSponsorshipAlgoV1Height": 1092400
+		"selfSponsorshipAlgoV1Height": 1092400,
+		"feeValidationFixTimestamp": 1671918000000
 	},
 	"genesisInfo": {
 		"version": 4,