diff --git a/api/src/main/java/jakarta/json/JsonBuilderFactory.java b/api/src/main/java/jakarta/json/JsonBuilderFactory.java
index 214bf762..486dd8d8 100644
--- a/api/src/main/java/jakarta/json/JsonBuilderFactory.java
+++ b/api/src/main/java/jakarta/json/JsonBuilderFactory.java
@@ -50,6 +50,12 @@
  */
 public interface JsonBuilderFactory {
 
+    /**
+     * Configuration property to ignore null values. All providers
+     * must support this property. The value of the property is boolean.
+     */
+    public static final String IGNORE_ADDING_IF_NULL = "jakarta.json.JsonBuilderFactory.ignoreAddingIfNull";
+
     /**
      * Creates a {@code JsonObjectBuilder} instance that is used to build
      * {@link JsonObject}.