diff --git a/common.rc b/common.rc
index 67c2488d..d3c2a0c0 100644
--- a/common.rc
+++ b/common.rc
@@ -635,7 +635,7 @@ _xfs_mounted()
 
     device=$1
 
-    if _mount | grep $device | $AWK_PROG '
+    if _mount | grep "$device " | $AWK_PROG '
         /type xfs/  { print $3 ; exit 0 }
         END         { exit 1 }
     '