diff --git a/main/coreplugins/io.sarl.lang.core/src/io/sarl/lang/core/SRESpecificDataContainer.java b/main/coreplugins/io.sarl.lang.core/src/io/sarl/lang/core/SRESpecificDataContainer.java
index b2075495c3..261a0e1e46 100644
--- a/main/coreplugins/io.sarl.lang.core/src/io/sarl/lang/core/SRESpecificDataContainer.java
+++ b/main/coreplugins/io.sarl.lang.core/src/io/sarl/lang/core/SRESpecificDataContainer.java
@@ -35,7 +35,7 @@
  */
 public abstract class SRESpecificDataContainer {
 
-	private transient Object sreSpecificData;
+	private transient volatile Object sreSpecificData;
 
 	/** Replies the data associated to this agent trait by the SRE.
 	 *