diff --git a/src/net/http/fs.go b/src/net/http/fs.go
index 07d15b07e9..922706ada1 100644
--- a/src/net/http/fs.go
+++ b/src/net/http/fs.go
@@ -413,6 +413,7 @@ func checkIfNoneMatch(w ResponseWriter, r *Request) condResult {
 		}
 		if buf[0] == ',' {
 			buf = buf[1:]
+			continue
 		}
 		if buf[0] == '*' {
 			return condFalse