diff --git a/.github/actions/setup-ros2/action.yml b/.github/actions/setup-ros2/action.yml
index 54b77b841a..1e35624a7f 100644
--- a/.github/actions/setup-ros2/action.yml
+++ b/.github/actions/setup-ros2/action.yml
@@ -9,6 +9,6 @@ runs:
      # see https://github.com/ros-tooling/setup-ros/issues/80 and https://github.com/ros2/rmw_cyclonedds/pull/134
      run: sed -e 's/azure.archive.ubuntu.com/us.archive.ubuntu.com/g' -e t -e d /etc/apt/sources.list | sudo tee /etc/apt/sources.list.d/nonazure.list
    - name: Setup ROS2
-     uses: ros-tooling/setup-ros@0.6.1
+     uses: ros-tooling/setup-ros@0.7.0
      with:
        required-ros-distributions: rolling
diff --git a/core/src/main/java/org/lflang/generator/c/CReactionGenerator.java b/core/src/main/java/org/lflang/generator/c/CReactionGenerator.java
index 2a9219983a..0cb4e7cd0b 100644
--- a/core/src/main/java/org/lflang/generator/c/CReactionGenerator.java
+++ b/core/src/main/java/org/lflang/generator/c/CReactionGenerator.java
@@ -584,6 +584,7 @@ private static String generateActionVariablesInReaction(
                 + ")"
                 + tokenPointer
                 + "->value;");
+        builder.pr(action.getName() + "->length = " + tokenPointer + "->length;");
       } else {
         builder.pr(
             action.getName()