diff --git a/148 b/148
index a2621c1e..43052622 100755
--- a/148
+++ b/148
@@ -32,7 +32,7 @@ trap "_cleanup; exit \$status" 0 1 2 3 15
 . ./common.filter
 . ./common.repair
 
-[ -z $XFS_PARALLEL_REPAIR64_PROG ] && _notrun "parallel repair binary xfs_prepair64 is not installed"
+[ -z "$XFS_PARALLEL_REPAIR64_PROG" ] && _notrun "parallel repair binary xfs_prepair64 is not installed"
 
 # force use of parallel repair
 export XFS_REPAIR_PROG=$XFS_PARALLEL_REPAIR64_PROG
diff --git a/149 b/149
index 5ac913c7..0e9d9748 100755
--- a/149
+++ b/149
@@ -25,7 +25,7 @@ rm -f $seq.full
 . ./common.repair
 . ./common.filter
 
-[ -z $XFS_PARALLEL_REPAIR_PROG ] && _notrun "parallel repair binary xfs_prepair is not installed"
+[ -z "$XFS_PARALLEL_REPAIR_PROG" ] && _notrun "parallel repair binary xfs_prepair is not installed"
 
 # force use of parallel repair
 export XFS_REPAIR_PROG=$XFS_PARALLEL_REPAIR_PROG