diff --git a/mozilla/extensions/webservices/soap/src/nsHTTPSOAPTransport.cpp b/mozilla/extensions/webservices/soap/src/nsHTTPSOAPTransport.cpp
index 4cfb8e69b06..c4b7df093ad 100644
--- a/mozilla/extensions/webservices/soap/src/nsHTTPSOAPTransport.cpp
+++ b/mozilla/extensions/webservices/soap/src/nsHTTPSOAPTransport.cpp
@@ -349,6 +349,11 @@ NS_IMETHODIMP nsHTTPSOAPTransport::SyncCall(nsISOAPCall * aCall, nsISOAPResponse
   if (NS_FAILED(rv))
     return rv;
 
+  rv = request->SetRequestHeader(NS_LITERAL_CSTRING("Content-Type"),
+                                 NS_LITERAL_CSTRING("text/xml; charset=UTF-8"));
+  if (NS_FAILED(rv))
+    return rv;
+
   nsAutoString action;
   rv = aCall->GetActionURI(action);
   if (NS_FAILED(rv))
@@ -564,6 +569,11 @@ NS_IMETHODIMP
   if (NS_FAILED(rv))
     return rv;
 
+  rv = request->SetRequestHeader(NS_LITERAL_CSTRING("Content-Type"),
+                                 NS_LITERAL_CSTRING("text/xml; charset=UTF-8"));
+  if (NS_FAILED(rv))
+    return rv;
+
   // Apache Axis web services WSDL files say to set soapAction to "" and require it to be sent.  
   // So only check if its not void instead of using AStringIsNull.