diff --git a/cluster/addons/cluster-monitoring/google/heapster-controller.yaml b/cluster/addons/cluster-monitoring/google/heapster-controller.yaml
index cea80f0dfad..f936d5d2980 100644
--- a/cluster/addons/cluster-monitoring/google/heapster-controller.yaml
+++ b/cluster/addons/cluster-monitoring/google/heapster-controller.yaml
@@ -112,6 +112,8 @@ spec:
             - --container=heapster
             - --poll-period=300000
             - --estimator=exponential
+            # Specifies the smallest cluster (defined in number of nodes)
+            # resources will be scaled to.
             - --minClusterSize={{ heapster_min_cluster_size }}
         - image: k8s.gcr.io/addon-resizer:1.8.2
           name: eventer-nanny
diff --git a/cluster/addons/cluster-monitoring/googleinfluxdb/heapster-controller-combined.yaml b/cluster/addons/cluster-monitoring/googleinfluxdb/heapster-controller-combined.yaml
index 62c38bd2098..9d6bde7f0b1 100644
--- a/cluster/addons/cluster-monitoring/googleinfluxdb/heapster-controller-combined.yaml
+++ b/cluster/addons/cluster-monitoring/googleinfluxdb/heapster-controller-combined.yaml
@@ -113,6 +113,8 @@ spec:
             - --container=heapster
             - --poll-period=300000
             - --estimator=exponential
+            # Specifies the smallest cluster (defined in number of nodes)
+            # resources will be scaled to.
             - --minClusterSize={{ heapster_min_cluster_size }}
         - image: k8s.gcr.io/addon-resizer:1.8.2
           name: eventer-nanny
diff --git a/cluster/addons/cluster-monitoring/influxdb/heapster-controller.yaml b/cluster/addons/cluster-monitoring/influxdb/heapster-controller.yaml
index 06fc3a4f6c5..d86739a7a9b 100644
--- a/cluster/addons/cluster-monitoring/influxdb/heapster-controller.yaml
+++ b/cluster/addons/cluster-monitoring/influxdb/heapster-controller.yaml
@@ -112,6 +112,8 @@ spec:
             - --container=heapster
             - --poll-period=300000
             - --estimator=exponential
+            # Specifies the smallest cluster (defined in number of nodes)
+            # resources will be scaled to.
             - --minClusterSize={{ heapster_min_cluster_size }}
         - image: k8s.gcr.io/addon-resizer:1.8.2
           name: eventer-nanny
diff --git a/cluster/addons/cluster-monitoring/stackdriver/heapster-controller.yaml b/cluster/addons/cluster-monitoring/stackdriver/heapster-controller.yaml
index 6198f3c9902..a69ab9026b7 100644
--- a/cluster/addons/cluster-monitoring/stackdriver/heapster-controller.yaml
+++ b/cluster/addons/cluster-monitoring/stackdriver/heapster-controller.yaml
@@ -113,6 +113,8 @@ spec:
             - --container=heapster
             - --poll-period=300000
             - --estimator=exponential
+            # Specifies the smallest cluster (defined in number of nodes)
+            # resources will be scaled to.
             - --minClusterSize={{ heapster_min_cluster_size }}
       volumes:
         - name: heapster-config-volume
diff --git a/cluster/addons/cluster-monitoring/standalone/heapster-controller.yaml b/cluster/addons/cluster-monitoring/standalone/heapster-controller.yaml
index 1883099781f..18bfe64c373 100644
--- a/cluster/addons/cluster-monitoring/standalone/heapster-controller.yaml
+++ b/cluster/addons/cluster-monitoring/standalone/heapster-controller.yaml
@@ -92,6 +92,8 @@ spec:
             - --container=heapster
             - --poll-period=300000
             - --estimator=exponential
+            # Specifies the smallest cluster (defined in number of nodes)
+            # resources will be scaled to.
             - --minClusterSize={{ heapster_min_cluster_size }}
       volumes:
         - name: heapster-config-volume