diff --git a/src/main/java/com/oembedler/moon/graphql/engine/dfs/GraphQLSchemaDfsTraversal.java b/src/main/java/com/oembedler/moon/graphql/engine/dfs/GraphQLSchemaDfsTraversal.java
index ebda3f7..7637604 100644
--- a/src/main/java/com/oembedler/moon/graphql/engine/dfs/GraphQLSchemaDfsTraversal.java
+++ b/src/main/java/com/oembedler/moon/graphql/engine/dfs/GraphQLSchemaDfsTraversal.java
@@ -288,7 +288,7 @@ public GraphQLFieldDefinition getFieldDefinition(DfsContext dfsContext, Class<?>
                     .deprecate(resolvableTypeAccessor.getGraphQLDeprecationReason())
                     .description(resolvableTypeAccessor.getDescription());
 
-            boolean isConstant = Modifier.isFinal(field.getModifiers()) && Modifier.isStatic(field.getModifiers());
+            boolean isConstant = isPublicConstant(field);
             if (isConstant) {
                 graphQLFieldDefinitionBuilder.staticValue(org.springframework.util.ReflectionUtils.getField(field, null));
             }
@@ -299,6 +299,13 @@ public GraphQLFieldDefinition getFieldDefinition(DfsContext dfsContext, Class<?>
         return graphQLFieldDefinition;
     }
 
+    private boolean isPublicConstant(Field field) {
+        int modifiers = field.getModifiers();
+        return Modifier.isFinal(modifiers)
+                && Modifier.isStatic(modifiers)
+                && !Modifier.isPrivate(modifiers);
+    }
+
     public void addToFieldDefinitionResolverMap(DfsContext dfsContext, GraphQLFieldDefinition graphQLFieldDefinition, String complexitySpelExpression) {
         fieldDefinitionResolverMap.put(graphQLFieldDefinition,
                 new GraphQLFieldDefinitionWrapper(graphQLFieldDefinition, complexitySpelExpression));