diff --git a/java/google/registry/flows/domain/DomainAllocateFlow.java b/java/google/registry/flows/domain/DomainAllocateFlow.java
index 54532356e..d11ffa386 100644
--- a/java/google/registry/flows/domain/DomainAllocateFlow.java
+++ b/java/google/registry/flows/domain/DomainAllocateFlow.java
@@ -394,7 +394,7 @@ public class DomainAllocateFlow implements TransactionalFlow {
     FeeCreateCommandExtension feeCreate =
         eppInput.getSingleExtension(FeeCreateCommandExtension.class);
     return (feeCreate == null)
-        ? ImmutableList.of()
+        ? ImmutableList.<FeeTransformResponseExtension>of()
         : ImmutableList.of(createFeeCreateResponse(feeCreate, commandOperations));
   }
 
diff --git a/java/google/registry/flows/domain/DomainCreateFlow.java b/java/google/registry/flows/domain/DomainCreateFlow.java
index 659366ecc..72d1ab208 100644
--- a/java/google/registry/flows/domain/DomainCreateFlow.java
+++ b/java/google/registry/flows/domain/DomainCreateFlow.java
@@ -440,7 +440,7 @@ public class DomainCreateFlow implements TransactionalFlow {
   private ImmutableList<FeeTransformResponseExtension> createResponseExtensions(
       FeeCreateCommandExtension feeCreate, EppCommandOperations commandOperations) {
     return (feeCreate == null)
-        ? ImmutableList.of()
+        ? ImmutableList.<FeeTransformResponseExtension>of()
         : ImmutableList.of(createFeeCreateResponse(feeCreate, commandOperations));
   }
 
diff --git a/java/google/registry/flows/domain/DomainRenewFlow.java b/java/google/registry/flows/domain/DomainRenewFlow.java
index f6af5a3c9..d0c7e7c65 100644
--- a/java/google/registry/flows/domain/DomainRenewFlow.java
+++ b/java/google/registry/flows/domain/DomainRenewFlow.java
@@ -217,7 +217,7 @@ public final class DomainRenewFlow implements TransactionalFlow {
   private ImmutableList<FeeTransformResponseExtension> createResponseExtensions(
       Money renewCost, FeeRenewCommandExtension feeRenew) {
     return (feeRenew == null)
-        ? ImmutableList.of()
+        ? ImmutableList.<FeeTransformResponseExtension>of()
         : ImmutableList.of(feeRenew.createResponseBuilder()
             .setCurrency(renewCost.getCurrencyUnit())
             .setFees(ImmutableList.of(Fee.create(renewCost.getAmount(), FeeType.RENEW)))
diff --git a/java/google/registry/flows/domain/DomainRestoreRequestFlow.java b/java/google/registry/flows/domain/DomainRestoreRequestFlow.java
index 8beaa5ef8..ca946ae32 100644
--- a/java/google/registry/flows/domain/DomainRestoreRequestFlow.java
+++ b/java/google/registry/flows/domain/DomainRestoreRequestFlow.java
@@ -261,7 +261,7 @@ public final class DomainRestoreRequestFlow implements TransactionalFlow  {
   private static ImmutableList<FeeTransformResponseExtension> createResponseExtensions(
       Money restoreCost, Money renewCost, FeeUpdateCommandExtension feeUpdate) {
     return (feeUpdate == null)
-        ? ImmutableList.of()
+        ? ImmutableList.<FeeTransformResponseExtension>of()
         : ImmutableList.of(feeUpdate.createResponseBuilder()
             .setCurrency(restoreCost.getCurrencyUnit())
             .setFees(ImmutableList.of(
diff --git a/java/google/registry/flows/domain/DomainTransferRequestFlow.java b/java/google/registry/flows/domain/DomainTransferRequestFlow.java
index 053783365..939fc7db6 100644
--- a/java/google/registry/flows/domain/DomainTransferRequestFlow.java
+++ b/java/google/registry/flows/domain/DomainTransferRequestFlow.java
@@ -408,7 +408,7 @@ public final class DomainTransferRequestFlow implements TransactionalFlow {
   private ImmutableList<FeeTransformResponseExtension> createResponseExtensions(Money renewCost,
       FeeTransferCommandExtension feeTransfer) {
     return feeTransfer == null
-        ? ImmutableList.of()
+        ? ImmutableList.<FeeTransformResponseExtension>of()
         : ImmutableList.of(feeTransfer.createResponseBuilder()
             .setCurrency(renewCost.getCurrencyUnit())
             .setFees(ImmutableList.of(Fee.create(renewCost.getAmount(), FeeType.RENEW)))