diff --git a/CHANGES_NEXT_RELEASE b/CHANGES_NEXT_RELEASE
index cf7c7e0529..dc2f033b73 100644
--- a/CHANGES_NEXT_RELEASE
+++ b/CHANGES_NEXT_RELEASE
@@ -3,6 +3,7 @@
   #1708: Reloaded hosted contexts were not persisted in mongo, only the context cache
   #XXXX: Using "VocabProperty" and not "VocabularyProperty" (old name still accepted as input)
   #XXXX: Array reduction for LanguageProperty languageMap values
+  #XXXX: Array reduction for VocabProperty vocab values, for normalized mode
 
 ## New Features:
   #1707: Support for local=true in the type discovery endpoints (GET /ngsi-ld/v1/types[/{typeName}]
diff --git a/src/lib/orionld/payloadCheck/pCheckAttribute.cpp b/src/lib/orionld/payloadCheck/pCheckAttribute.cpp
index 368acfb440..aab027a0c8 100644
--- a/src/lib/orionld/payloadCheck/pCheckAttribute.cpp
+++ b/src/lib/orionld/payloadCheck/pCheckAttribute.cpp
@@ -1127,8 +1127,13 @@ static bool pCheckAttributeObject
       else
         LM_W(("No languageMap field found!"));
     }
-
-    if (attributeType == NoAttributeType)
+    else if (attributeType == VocabularyProperty)
+    {
+      KjNode* vocabP = kjLookup(attrP, "vocab");
+      if (vocabP != NULL)
+        arrayReduce(vocabP);
+    }
+    else if (attributeType == NoAttributeType)
     {
       if (isGeoJsonValue(attrP))
       {
diff --git a/test/functionalTest/cases/0000_ngsild/ngsild_vocab-property.test b/test/functionalTest/cases/0000_ngsild/ngsild_vocab-property.test
index d1826fa539..7ca7d6100b 100644
--- a/test/functionalTest/cases/0000_ngsild/ngsild_vocab-property.test
+++ b/test/functionalTest/cases/0000_ngsild/ngsild_vocab-property.test
@@ -50,6 +50,9 @@ accumulatorStart --pretty-print
 # 11. Query entities with q=V1==abc&expandValues=V1,V2 => see urn:E1
 # 12. Query entities with q=V2==id&expandValues=V1,V2 => see urn:E2
 #
+# 13. Create an entity urn:E4, type T, with a VocabProperty V4 whose vocab is an array with a single element - for array reduction
+# 14. GET urn:E4 in normalized format, see V4 with an array-recuced 'vocab'
+#
 
 echo '01. Create a subscription on entity type T'
 echo '=========================================='
@@ -194,6 +197,25 @@ echo
 echo
 
 
+echo "13. Create an entity urn:E4, type T, with a VocabProperty V4 whose vocab is an array with a single element - for array reduction"
+echo "================================================================================================================================"
+payload='{
+  "id": "urn:E4",
+  "type": "T",
+  "V4": { "type": "VocabProperty", "vocab": [ "test" ] }
+}'
+orionCurl --url /ngsi-ld/v1/entities --payload "$payload"
+echo
+echo
+
+
+echo "14. GET urn:E4 in normalized format, see V4 with an array-recuced 'vocab'"
+echo "========================================================================="
+orionCurl --url /ngsi-ld/v1/entities/urn:E4
+echo
+echo
+
+
 --REGEXPECT--
 01. Create a subscription on entity type T
 ==========================================