diff --git a/apis/api-mal/src/main/java/org/ccsds/moims/mo/mal/MALElementsRegistry.java b/apis/api-mal/src/main/java/org/ccsds/moims/mo/mal/MALElementsRegistry.java
index 75a5b4a7b..327bda95d 100644
--- a/apis/api-mal/src/main/java/org/ccsds/moims/mo/mal/MALElementsRegistry.java
+++ b/apis/api-mal/src/main/java/org/ccsds/moims/mo/mal/MALElementsRegistry.java
@@ -42,7 +42,7 @@ public class MALElementsRegistry {
      * @param absoluteSFP The absolute short form part.
      * @param callable The method with the generation of the Element.
      */
-    public synchronized void addCallableElement(Long absoluteSFP, Callable<Element> callable) {
+    public void addCallableElement(Long absoluteSFP, Callable<Element> callable) {
         ELEMENTS.put(absoluteSFP, callable);
     }
 
@@ -149,7 +149,7 @@ public static Element elementListToElement(ElementList obj) throws NotFoundExcep
         }
     }
 
-    public void registerElementsForArea(MALArea malArea) {
+    public synchronized void registerElementsForArea(MALArea malArea) {
         Element[] elements = malArea.getElements();
 
         for (Element element : elements) {
@@ -157,7 +157,7 @@ public void registerElementsForArea(MALArea malArea) {
         }
     }
 
-    public void registerElementsForService(MALService malService) {
+    public synchronized void registerElementsForService(MALService malService) {
         Element[] elements = malService.getElements();
 
         for (Element element : elements) {