--- a/src/jdk.jpackage/share/classes/jdk/jpackage/internal/BundlerParamInfo.java	Tue Feb 12 11:54:56 2019 -0500
+++ b/src/jdk.jpackage/share/classes/jdk/jpackage/internal/BundlerParamInfo.java	Tue Feb 12 11:58:41 2019 -0500
@@ -51,11 +51,16 @@
     String id;
 
     /**
-     * Type of the parameter.
+     * Type of the parameter
      */
     Class<T> valueType;
 
     /**
+     * Indicates if value was set using default value function
+     */
+    boolean isDefaultValue;
+
+    /**
      * If the value is not set, and no fallback value is found,
      * the parameter uses the value returned by the producer.
      */
@@ -94,6 +99,10 @@
         this.valueType = valueType;
     }
 
+    boolean getIsDefaultValue() {
+        return isDefaultValue;
+    }
+
     Function<Map<String, ? super Object>, T> getDefaultValueFunction() {
         return defaultValueFunction;
     }
@@ -144,6 +153,7 @@
             T result =  getDefaultValueFunction().apply(params);
             if (result != null) {
                 params.put(getID(), result);
+                isDefaultValue = true;
             }
             return result;
         }