diff --git a/src/client.ts b/src/client.ts
index 4486fb893..4ce60dac2 100644
--- a/src/client.ts
+++ b/src/client.ts
@@ -194,7 +194,6 @@ export class Client extends EventEmitter {
       this.wsdl.options.overrideRootElement = options.overrideRootElement;
     }
     this.wsdl.options.forceSoap12Headers = !!options.forceSoap12Headers;
-    this.wsdl.options.addHeadersAction = !!options.addHeadersAction;
   }
 
   private _defineService(service: ServiceElement, endpoint?: string) {
@@ -361,10 +360,7 @@ export class Client extends EventEmitter {
     }
 
     if (this.wsdl.options.forceSoap12Headers) {
-      headers['Content-Type'] = 'application/soap+xml; charset=utf-8';
-      if (this.wsdl.options.addHeadersAction) {
-        headers['Content-Type'] += '; action=' + soapAction;
-      }
+      headers['Content-Type'] = `application/soap+xml; charset=utf-8; action="${soapAction}"`;
       xmlnsSoap = 'xmlns:' + envelopeKey + '="http://www.w3.org/2003/05/soap-envelope"';
     } else {
       headers.SOAPAction = '"' + soapAction + '"';
diff --git a/src/types.ts b/src/types.ts
index d026d7aea..d3ed2debc 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -94,8 +94,6 @@ export interface IWsdlBaseOptions {
   wsdl_options?: { [key: string]: any };
   /** set proper headers for SOAP v1.2. */
   forceSoap12Headers?: boolean;
-  /** set content type header action for SOAP v1.2 */
-  addHeadersAction?: boolean;
 }
 
 /** @deprecated use IOptions */
diff --git a/src/wsdl/index.ts b/src/wsdl/index.ts
index 83c34ccb7..ff1c2ccd7 100644
--- a/src/wsdl/index.ts
+++ b/src/wsdl/index.ts
@@ -1142,7 +1142,6 @@ export class WSDL {
 
     // Works only in client
     this.options.forceSoap12Headers = options.forceSoap12Headers;
-    this.options.addHeadersAction = options.addHeadersAction;
     this.options.customDeserializer = options.customDeserializer;
 
     if (options.overrideRootElement !== undefined) {
diff --git a/test/client-test.js b/test/client-test.js
index ad349d4aa..774d720ef 100644
--- a/test/client-test.js
+++ b/test/client-test.js
@@ -422,24 +422,7 @@ var fs = require('fs'),
             assert.ok(result);
             assert.ok(client.lastRequestHeaders);
             assert.ok(client.lastRequest);
-            assert.equal(client.lastRequestHeaders['Content-Type'], 'application/soap+xml; charset=utf-8');
-            assert.notEqual(client.lastRequest.indexOf('xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\"'), -1);
-            assert(!client.lastRequestHeaders.SOAPAction);
-            done();
-          }, null, { 'test-header': 'test' });
-        }, baseUrl);
-      });
-
-      it('should add proper headers for soap12 with action in content type', function (done) {
-        soap.createClient(__dirname + '/wsdl/default_namespace_soap12.wsdl', _.assign({ forceSoap12Headers: true, addHeadersAction: true}, meta.options), function (err, client) {
-          assert.ok(client);
-          assert.ifError(err);
-
-          client.MyOperation({}, function (err, result) {
-            assert.ok(result);
-            assert.ok(client.lastRequestHeaders);
-            assert.ok(client.lastRequest);
-            assert.equal(client.lastRequestHeaders['Content-Type'], 'application/soap+xml; charset=utf-8; action=MyOperation');
+            assert.equal(client.lastRequestHeaders['Content-Type'], 'application/soap+xml; charset=utf-8; action="MyOperation"');
             assert.notEqual(client.lastRequest.indexOf('xmlns:soap=\"http://www.w3.org/2003/05/soap-envelope\"'), -1);
             assert(!client.lastRequestHeaders.SOAPAction);
             done();