diff --git a/extra/io/sniffer/bsd/bsd.factor b/extra/io/sniffer/bsd/bsd.factor
index ae87c05d38..66336425a1 100644
--- a/extra/io/sniffer/bsd/bsd.factor
+++ b/extra/io/sniffer/bsd/bsd.factor
@@ -7,7 +7,7 @@ sequences io.sniffer.backend ;
 QUALIFIED: unix
 IN: io.sniffer.bsd
 
-M: unix-io destruct-handle ( obj -- ) close drop ;
+M: unix-io destruct-handle ( obj -- ) unix:close drop ;
 
 C-UNION: ifreq_props "sockaddr-in" "short" "int" "caddr_t" ;
 C-STRUCT: ifreq { { "char" 16 } "name" } { "ifreq_props" "props" } ;