diff --git a/src/main/java/com/cloudbees/jenkins/plugins/amazonecs/ECSService.java b/src/main/java/com/cloudbees/jenkins/plugins/amazonecs/ECSService.java
index 01a33a64..24f947e6 100644
--- a/src/main/java/com/cloudbees/jenkins/plugins/amazonecs/ECSService.java
+++ b/src/main/java/com/cloudbees/jenkins/plugins/amazonecs/ECSService.java
@@ -303,7 +303,6 @@ TaskDefinition registerTemplate(final String cloudName, final ECSTaskTemplate te
             final RegisterTaskDefinitionRequest request = new RegisterTaskDefinitionRequest()
                     .withFamily(familyName)
                     .withVolumes(template.getVolumeEntries())
-                    .withContainerDefinitions(def)
                     .withPlacementConstraints(template.getPlacementConstraintEntries())
                     .withTags(tags)
                     .withContainerDefinitions(def);