diff --git a/net_linux.go b/net_linux.go
index ad2b8a7..871e8e0 100644
--- a/net_linux.go
+++ b/net_linux.go
@@ -6,7 +6,7 @@ import (
 	"strings"
 )
 
-func NetIOCounters() ([]NetIOCountersStat, error) {
+func NetIOCounters(pernic bool) ([]NetIOCountersStat, error) {
 	filename := "/proc/net/dev"
 	lines, err := readLines(filename)
 	if err != nil {