diff --git a/collector/filesystem_freebsd.go b/collector/filesystem_freebsd.go
index b726a656..957e383b 100644
--- a/collector/filesystem_freebsd.go
+++ b/collector/filesystem_freebsd.go
@@ -21,7 +21,6 @@ import (
 import "C"
 
 const (
-	procMounts          = "/proc/mounts"
 	filesystemSubsystem = "filesystem"
 )