Index: mapwms.c
 ===================================================================
 --- a/mapwms.c    (revision 10869)
 +++ b/mapwms.c    (working copy)
 @@ -739,8 +739,8 @@
             strcasecmp(wms_exception_format, "XML") != 0)
         {
             msSetError(MS_WMSERR,
 -                      "Invalid format for the EXCEPTIONS parameter.",
 -                      "msWMSLoadGetMapParams()");
 +                      "Invalid format %s for the EXCEPTIONS parameter.",
 +                      "msWMSLoadGetMapParams()", wms_exception_format);
             return msWMSException(map, nVersion, "InvalidFormat", wms_exception_format);
         }
     }