diff --git a/vocabularies/Org.OData.Validation.V1.json b/vocabularies/Org.OData.Validation.V1.json
index 9bc62d10..780837c1 100644
--- a/vocabularies/Org.OData.Validation.V1.json
+++ b/vocabularies/Org.OData.Validation.V1.json
@@ -109,6 +109,7 @@
             "$Type": "Validation.ConstraintType",
             "$AppliesTo": [
                 "Property",
+                "NavigationProperty",
                 "EntityType",
                 "ComplexType"
             ],
diff --git a/vocabularies/Org.OData.Validation.V1.xml b/vocabularies/Org.OData.Validation.V1.xml
index 4047907e..60103045 100644
--- a/vocabularies/Org.OData.Validation.V1.xml
+++ b/vocabularies/Org.OData.Validation.V1.xml
@@ -109,7 +109,7 @@
         <Annotation Term="Core.Description" String="The value of the annotated property, parameter, or term must be an integer multiple of this positive value. For temporal types, the value is measured in seconds." />
       </Term>
 
-      <Term Name="Constraint" Type="Validation.ConstraintType" Nullable="false" AppliesTo="Property EntityType ComplexType">
+      <Term Name="Constraint" Type="Validation.ConstraintType" Nullable="false" AppliesTo="Property NavigationProperty EntityType ComplexType">
         <Annotation Term="Core.Description" String="Condition that the annotation target has to fulfill" />
       </Term>
       <ComplexType Name="ConstraintType">