diff --git a/src/md5_darwin_freebsd.sh b/src/md5_darwin_freebsd.sh
index cd9c7687bc..2c5e71959a 100755
--- a/src/md5_darwin_freebsd.sh
+++ b/src/md5_darwin_freebsd.sh
@@ -14,4 +14,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-/sbin/md5 "$@" | /sbin/md5 | head -c 32
+@md5sum@ "$@" | @md5sum@ | head -c 32
diff --git a/src/md5_default.sh b/src/md5_default.sh
index d5d4f0b8f4..2c5e71959a 100755
--- a/src/md5_default.sh
+++ b/src/md5_default.sh
@@ -14,4 +14,4 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
-md5sum "$@" | md5sum | head -c 32
+@md5sum@ "$@" | @md5sum@ | head -c 32
diff --git a/src/md5_openbsd.sh b/src/md5_openbsd.sh
index 6c85df1899..67c3bd9fed 100755
--- a/src/md5_openbsd.sh
+++ b/src/md5_openbsd.sh
@@ -16,4 +16,4 @@
 #
 # We avoid using the `head` tool's `-c` option, since it does not exist
 # on OpenBSD.
-/bin/md5 "$@" | /bin/md5 | dd bs=32 count=1
+@md5sum@ "$@" | @md5sum@ | dd bs=32 count=1