diff --git a/scr/src/main/java/org/apache/felix/scr/impl/helper/ActivateMethod.java b/scr/src/main/java/org/apache/felix/scr/impl/helper/ActivateMethod.java
index 303e7f0..6687a61 100644
--- a/scr/src/main/java/org/apache/felix/scr/impl/helper/ActivateMethod.java
+++ b/scr/src/main/java/org/apache/felix/scr/impl/helper/ActivateMethod.java
@@ -29,9 +29,9 @@
 public class ActivateMethod extends BaseMethod
 {
 
-    Class[] ACTIVATE_TYPES_DS11 =
+    private static final Class[] ACTIVATE_TYPES_DS11 =
         { COMPONENT_CONTEXT_CLASS, BUNDLE_CONTEXT_CLASS, MAP_CLASS };
-    Class[] ACTIVATE_TYPES_DS10 =
+    static final Class[] ACTIVATE_TYPES_DS10 =
         { COMPONENT_CONTEXT_CLASS };