diff --git a/rt/bindings/soap/src/main/java/org/apache/cxf/binding/soap/interceptor/SoapPreProtocolOutInterceptor.java b/rt/bindings/soap/src/main/java/org/apache/cxf/binding/soap/interceptor/SoapPreProtocolOutInterceptor.java
index eba5bfe..62946ca 100644
--- a/rt/bindings/soap/src/main/java/org/apache/cxf/binding/soap/interceptor/SoapPreProtocolOutInterceptor.java
+++ b/rt/bindings/soap/src/main/java/org/apache/cxf/binding/soap/interceptor/SoapPreProtocolOutInterceptor.java
@@ -118,9 +118,7 @@
                 message.put(Message.PROTOCOL_HEADERS, reqHeaders);
             }
             
-            if (!reqHeaders.containsKey(SoapBindingConstants.SOAP_ACTION)) {            
-                reqHeaders.put(SoapBindingConstants.SOAP_ACTION, Collections.singletonList(action));
-            }
+            reqHeaders.put(SoapBindingConstants.SOAP_ACTION, Collections.singletonList(action));
         } else if (message.getVersion() instanceof Soap12 && !"\"\"".equals(action)) {
             String ct = (String) message.get(Message.CONTENT_TYPE);