diff --git a/tck/src/main/java/com/sun/ts/tests/el/common/util/Fault.java b/tck/src/main/java/com/sun/ts/tests/el/common/util/Fault.java
index 02ecea3..779dfcb 100644
--- a/tck/src/main/java/com/sun/ts/tests/el/common/util/Fault.java
+++ b/tck/src/main/java/com/sun/ts/tests/el/common/util/Fault.java
@@ -112,7 +112,7 @@
     }
 
     @Override
-    public Throwable getCause() {
+    public synchronized Throwable getCause() {
       return t;
     }