diff --git a/ipojo/manipulator/annotations/src/main/java/org/apache/felix/ipojo/annotations/ServiceProperty.java b/ipojo/manipulator/annotations/src/main/java/org/apache/felix/ipojo/annotations/ServiceProperty.java
index 5eed009..5ce5f39 100644
--- a/ipojo/manipulator/annotations/src/main/java/org/apache/felix/ipojo/annotations/ServiceProperty.java
+++ b/ipojo/manipulator/annotations/src/main/java/org/apache/felix/ipojo/annotations/ServiceProperty.java
@@ -40,11 +40,18 @@
      * Default : empty
      */
     String value() default "";
-    
+
     /**
      * Is the property mandatory?
      * Default: false
      */
     boolean mandatory() default false;
 
+    /**
+     * Is the service property immutable ?
+     * An immutable property <b>MUST</b> have a value
+     * Default {@literal false}
+     */
+    boolean immutable() default false;
+
 }
diff --git a/ipojo/manipulator/annotations/src/main/java/org/apache/felix/ipojo/annotations/StaticServiceProperty.java b/ipojo/manipulator/annotations/src/main/java/org/apache/felix/ipojo/annotations/StaticServiceProperty.java
index c3adae1..969725d 100644
--- a/ipojo/manipulator/annotations/src/main/java/org/apache/felix/ipojo/annotations/StaticServiceProperty.java
+++ b/ipojo/manipulator/annotations/src/main/java/org/apache/felix/ipojo/annotations/StaticServiceProperty.java
@@ -51,4 +51,11 @@
      * This value is required only for static properties.
      */
     String type();
+
+    /**
+     * Is the property immutable ?
+     * An immutable property <b>MUST</b> have a value
+     * Default: {@literal false}
+     */
+    boolean immutable() default false;
 }