-(def-alien-type unsigned-char (unsigned 8))
-(def-alien-type unsigned-short (unsigned 16))
-(def-alien-type unsigned-int (unsigned 32))
-(def-alien-type unsigned-long (unsigned #!-alpha 32 #!+alpha 64))
+(define-alien-type unsigned-char (unsigned 8))
+(define-alien-type unsigned-short (unsigned 16))
+(define-alien-type unsigned-int (unsigned 32))
+(define-alien-type unsigned-long (unsigned #!-alpha 32 #!+alpha 64))