diff --git a/library/system/filesystem b/library/system/filesystem
index 698c71d4534..46e798f6e81 100644
--- a/library/system/filesystem
+++ b/library/system/filesystem
@@ -79,7 +79,7 @@ def main():
 
     cmd = module.get_bin_path('blkid', required=True)
 
-    rc,raw_fs,err = module.run_command("%s -o value -s TYPE %s" % (cmd, dev))
+    rc,raw_fs,err = module.run_command("%s -c /dev/null -o value -s TYPE %s" % (cmd, dev))
     fs = raw_fs.strip()