diff --git a/passphrase-from-tpm.sh b/passphrase-from-tpm.sh
index 1fec532..b0704dd 100755
--- a/passphrase-from-tpm.sh
+++ b/passphrase-from-tpm.sh
@@ -2,7 +2,7 @@
 set -e
 echo "Unlocking via TPM" >&2
 export TPM2TOOLS_TCTI="device:/dev/tpm0"
-/usr/bin/tpm2_unseal -c 0x81000000 -L sha256:0,1,4,5,7
+/usr/bin/tpm2_unseal -c 0x81000000 -p pcr:sha256:0,1,4,5,7
 if [ $? -eq 0 ]; then
 	exit
 fi