diff --git a/nifi-docker/dockerhub/sh/common.sh b/nifi-docker/dockerhub/sh/common.sh
index f3ea43580e..d78aec494c 100755
--- a/nifi-docker/dockerhub/sh/common.sh
+++ b/nifi-docker/dockerhub/sh/common.sh
@@ -19,14 +19,28 @@
 # 3 - file to perform replacement inline
 prop_replace () {
   target_file=${3:-${nifi_props_file}}
-  echo 'replacing target file ' ${target_file}
+  echo "File [${target_file}] replacing [${1}]"
   sed -i -e "s|^$1=.*$|$1=$2|"  ${target_file}
 }
 
 uncomment() {
-	target_file=${2}
-	echo "Uncommenting ${target_file}"
-	sed -i -e "s|^\#$1|$1|" ${target_file}
+  target_file=${2}
+  echo "File [${target_file}] uncommenting [${1}]"
+  sed -i -e "s|^\#$1|$1|" ${target_file}
+}
+
+# 1 - property key to add or replace
+# 2 - property value to use
+# 3 - file to perform replacement inline
+prop_add_or_replace () {
+  target_file=${3:-${nifi_props_file}}
+  property_found=$(awk -v property="${1}" 'index($0, property) == 1')
+  if [ -z "${property_found}" ]; then
+    echo "File [${target_file}] adding [${1}]"
+    echo "$1=$2" >> ${target_file}
+  else
+    prop_replace $1 $2 $3  
+  fi
 }
 
 # NIFI_HOME is defined by an ENV command in the backing Dockerfile
diff --git a/nifi-docker/dockerhub/sh/start.sh b/nifi-docker/dockerhub/sh/start.sh
index 40b33a33ae..869a8e41b5 100755
--- a/nifi-docker/dockerhub/sh/start.sh
+++ b/nifi-docker/dockerhub/sh/start.sh
@@ -97,6 +97,13 @@ prop_replace 'nifi.analytics.connection.model.implementation'   "${NIFI_ANALYTIC
 prop_replace 'nifi.analytics.connection.model.score.name'       "${NIFI_ANALYTICS_MODEL_SCORE_NAME:-rSquared}"
 prop_replace 'nifi.analytics.connection.model.score.threshold'  "${NIFI_ANALYTICS_MODEL_SCORE_THRESHOLD:-.90}"
 
+# Add NAR provider properties
+# nifi-registry NAR provider
+if [ -n "${NIFI_NAR_LIBRARY_PROVIDER_NIFI_REGISTRY_URL}" ]; then
+    prop_add_or_replace 'nifi.nar.library.provider.nifi-registry.implementation' 'org.apache.nifi.registry.extension.NiFiRegistryExternalResourceProvider'
+    prop_add_or_replace 'nifi.nar.library.provider.nifi-registry.url' "${NIFI_NAR_LIBRARY_PROVIDER_NIFI_REGISTRY_URL}"
+fi
+
 if [ -n "${NIFI_SENSITIVE_PROPS_KEY}" ]; then
     prop_replace 'nifi.sensitive.props.key' "${NIFI_SENSITIVE_PROPS_KEY}"
 fi