SRC is undefined

I have this code:
 
#contnt {
     height: 227px;
     width: 615px;
     background-image: url(images/bodymain2.jpg);
     padding: 0px 42px 0px 43px;
     color: #FFFFFF;
     font-family: Sylfaen, Tahoma, Verdana, Arial, "Times New Roman",
sans-serif;
     font-size: 14px;
     src: url(fonts/SYLFAEN0.eot);
     text-align: left;
}
 
according to the css2, css3 specs, src: is a valid attribute yet the
validator says: Property src doesn't exist : url(fonts/SYLFAEN0.eot)