diff --git a/.github/workflows/ts-tests.yml b/.github/workflows/ts-tests.yml
index 68330269b5..0d6e1c85b0 100644
--- a/.github/workflows/ts-tests.yml
+++ b/.github/workflows/ts-tests.yml
@@ -38,7 +38,7 @@ jobs:
         if: ${{ runner.os == 'macOS' || runner.os == 'Linux' }}
       - name: Perform TypeScript tests
         run: |
-          ./gradlew targetTest -Ptarget=TypeScript -Druntime="git://github.com/lf-lang/reactor-ts.git#dnet-ad-hoc"
+          ./gradlew targetTest -Ptarget=TypeScript -Druntime="git://github.com/lf-lang/reactor-ts.git#master"
       - name: Report to CodeCov
         uses: ./.github/actions/report-code-coverage
         with:
diff --git a/core/src/main/java/org/lflang/federated/launcher/FedLauncherGenerator.java b/core/src/main/java/org/lflang/federated/launcher/FedLauncherGenerator.java
index 6ccb6fd8ca..4f824ebc80 100644
--- a/core/src/main/java/org/lflang/federated/launcher/FedLauncherGenerator.java
+++ b/core/src/main/java/org/lflang/federated/launcher/FedLauncherGenerator.java
@@ -324,7 +324,7 @@ private String getRtiCommand(List<FederateInstance> federates, boolean isRemote)
     if (targetConfig.getOrDefault(TracingProperty.INSTANCE).isEnabled()) {
       commands.add("                        -t \\");
     }
-    if (targetConfig.getOrDefault(DNETProperty.INSTANCE)) {
+    if (!targetConfig.getOrDefault(DNETProperty.INSTANCE)) {
       commands.add("                        -d \\");
     }
     commands.addAll(
diff --git a/core/src/main/java/org/lflang/target/property/DNETProperty.java b/core/src/main/java/org/lflang/target/property/DNETProperty.java
index 958282cf69..9d34cca7b3 100644
--- a/core/src/main/java/org/lflang/target/property/DNETProperty.java
+++ b/core/src/main/java/org/lflang/target/property/DNETProperty.java
@@ -1,8 +1,11 @@
 package org.lflang.target.property;
 
 /**
- * If true, the RTI sends DNET signals during the execution of federation. The default is ture (for
- * now, for testing).
+ * @brief Target property turning on or off the DNET signal optimization.
+ * 
+ * If this target property is true, the RTI sends DNET (downstream next event tag) signals to an upstream federate
+ * to tell the federate that sending LTC and NET signals with tags less than the specified value is unnecessary.
+ * The default is true.
  */
 public final class DNETProperty extends BooleanProperty {
 
diff --git a/core/src/main/resources/lib/c/reactor-c b/core/src/main/resources/lib/c/reactor-c
index 05280d0f54..c2f5316458 160000
--- a/core/src/main/resources/lib/c/reactor-c
+++ b/core/src/main/resources/lib/c/reactor-c
@@ -1 +1 @@
-Subproject commit 05280d0f5488058693e18863725bcd1e5fe68a29
+Subproject commit c2f5316458bac61074285ca34d92a87c8511eaf9