diff --git a/src/test/pack.run b/src/test/pack.run
index 48d7895084e..3eaae5a0050 100644
--- a/src/test/pack.run
+++ b/src/test/pack.run
@@ -5,7 +5,7 @@ dd bs=1 count=65539 if=/dev/urandom of=mapped_file >& /dev/null
 dd bs=1 count=65539 if=/dev/urandom of=mapped_file2 >& /dev/null
 dd bs=1 count=1800 if=/dev/urandom of=mapped_file3 >& /dev/null
 dd bs=1 count=1800 if=/dev/urandom of=mapped_file4 >& /dev/null
-chmod u+x mapped_file*
+/bin/chmod u+x mapped_file*
 record pack$bitness
 
 pack || failed "'rr pack' failed"