diff --git a/.changeset/chilly-buses-itch.md b/.changeset/chilly-buses-itch.md
new file mode 100644
index 000000000..a5c5bfadb
--- /dev/null
+++ b/.changeset/chilly-buses-itch.md
@@ -0,0 +1,5 @@
+---
+"@boostxyz/sdk": patch
+---
+
+allow 4-byte function selectors in incentive criteria
diff --git a/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentive.ts b/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentive.ts
index 907a0680e..3ca154cce 100644
--- a/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentive.ts
+++ b/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentive.ts
@@ -29,6 +29,7 @@ import {
   decodeAbiParameters,
   decodeFunctionData,
   encodeAbiParameters,
+  pad,
   parseEther,
   parseEventLogs,
   zeroAddress,
@@ -844,7 +845,7 @@ export function prepareERC20PeggedVariableCriteriaIncentivePayload({
         maxReward,
         criteria: {
           criteriaType: criteria.criteriaType,
-          signature: criteria.signature,
+          signature: pad(criteria.signature),
           fieldIndex: criteria.fieldIndex,
           targetContract: criteria.targetContract,
         },
diff --git a/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentiveV2.test.ts b/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentiveV2.test.ts
index c53938e13..b087e4b87 100644
--- a/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentiveV2.test.ts
+++ b/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentiveV2.test.ts
@@ -358,4 +358,34 @@ describe("ERC20PeggedVariableCriteriaIncentive", () => {
 
     expect(balanceAfterClaim - balanceBeforeClaim).toBe(signedAmount);
   })
+
+  test("should deploy with a 4-byte function selector", async () => {
+    const fourByteSignature = "0xa9059cbb" as Hex; // transfer(address,uint256)
+
+    const incentiveWithFourByteSelector = fixtures.core.ERC20PeggedVariableCriteriaIncentiveV2({
+      asset: budgets.erc20.assertValidAddress(),
+      peg: zeroAddress,
+      limit: 1000000n,
+      reward: 1000000n,
+      maxReward: 1000000n,
+      criteria: {
+        criteriaType: SignatureType.FUNC,
+        signature: fourByteSignature,
+        fieldIndex: 1,
+        targetContract: budgets.erc20.assertValidAddress(),
+        valueType: ValueType.WAD,
+      },
+    });
+
+    const newBoost = await freshBoost(fixtures, {
+      budget: budgets.budget,
+      incentives: [incentiveWithFourByteSelector],
+    });
+    const incentive = newBoost.incentives[0] as ERC20PeggedVariableCriteriaIncentiveV2;
+    const deployedCriteria = await incentive.getIncentiveCriteria();
+
+    expect(isAddress(newBoost.incentives[0]!.assertValidAddress())).toBe(true);
+    expect(deployedCriteria.signature.length).toBe(66);
+    expect(deployedCriteria.signature.endsWith(fourByteSignature.slice(2))).toBe(true);
+  });
 });
diff --git a/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentiveV2.ts b/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentiveV2.ts
index b1da45041..cfac316c7 100644
--- a/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentiveV2.ts
+++ b/packages/sdk/src/Incentives/ERC20PeggedVariableCriteriaIncentiveV2.ts
@@ -29,6 +29,7 @@ import {
   decodeAbiParameters,
   decodeFunctionData,
   encodeAbiParameters,
+  pad,
   parseEther,
   parseEventLogs,
   zeroAddress,
@@ -923,7 +924,7 @@ export function prepareERC20PeggedVariableCriteriaIncentiveV2Payload({
         maxReward,
         criteria: {
           criteriaType: criteria.criteriaType,
-          signature: criteria.signature,
+          signature: pad(criteria.signature),
           fieldIndex: criteria.fieldIndex,
           targetContract: criteria.targetContract,
           valueType: criteria.valueType,
diff --git a/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentive.ts b/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentive.ts
index 2306d12b7..788c125a3 100644
--- a/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentive.ts
+++ b/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentive.ts
@@ -13,6 +13,7 @@ import {
   decodeAbiParameters,
   decodeFunctionData,
   encodeAbiParameters,
+  pad,
   parseEther,
   parseEventLogs,
   zeroAddress,
@@ -429,7 +430,7 @@ export function prepareERC20VariableCriteriaIncentivePayload({
         maxReward: maxReward,
         criteria: {
           criteriaType: criteria.criteriaType,
-          signature: criteria.signature,
+          signature: pad(criteria.signature),
           fieldIndex: criteria.fieldIndex,
           targetContract: criteria.targetContract,
         },
diff --git a/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentiveV2.test.ts b/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentiveV2.test.ts
index c45074861..652faecb7 100644
--- a/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentiveV2.test.ts
+++ b/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentiveV2.test.ts
@@ -272,4 +272,32 @@ describe("ERC20VariableCriteriaIncentiveV2", () => {
       true,
     );
   });
+
+  test("should deploy with a 4-byte function selector", async () => {
+    const fourByteSignature = "0xa9059cbb" as Hex; // transfer(address,uint256)
+
+    const incentiveWithFourByteSelector = fixtures.core.ERC20VariableCriteriaIncentiveV2({
+      asset: budgets.erc20.assertValidAddress(),
+      limit: 1000000n,
+      reward: 1000000n,
+      criteria: {
+        criteriaType: SignatureType.FUNC,
+        signature: fourByteSignature,
+        fieldIndex: 1,
+        targetContract: budgets.erc20.assertValidAddress(),
+        valueType: ValueType.WAD,
+      },
+    });
+
+    const newBoost = await freshBoost(fixtures, {
+      budget: budgets.budget,
+      incentives: [incentiveWithFourByteSelector],
+    });
+    const incentive = newBoost.incentives[0] as ERC20VariableCriteriaIncentiveV2;
+    const deployedCriteria = await incentive.getIncentiveCriteria();
+
+    expect(isAddress(newBoost.incentives[0]!.assertValidAddress())).toBe(true);
+    expect(deployedCriteria.signature.length).toBe(66);
+    expect(deployedCriteria.signature.endsWith(fourByteSignature.slice(2))).toBe(true);
+  });
 });
diff --git a/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentiveV2.ts b/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentiveV2.ts
index a09622875..cb518ecd0 100644
--- a/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentiveV2.ts
+++ b/packages/sdk/src/Incentives/ERC20VariableCriteriaIncentiveV2.ts
@@ -14,6 +14,7 @@ import {
   decodeAbiParameters,
   decodeFunctionData,
   encodeAbiParameters,
+  pad,
   parseEther,
   parseEventLogs,
   zeroAddress,
@@ -501,7 +502,7 @@ export function prepareERC20VariableCriteriaIncentiveV2Payload({
         maxReward: maxReward,
         criteria: {
           criteriaType: criteria.criteriaType,
-          signature: criteria.signature,
+          signature: pad(criteria.signature),
           fieldIndex: criteria.fieldIndex,
           targetContract: criteria.targetContract,
           valueType: criteria.valueType,