diff --git a/programs/psa/key_ladder_demo.sh b/programs/psa/key_ladder_demo.sh
index 0186183..dbe925b 100755
--- a/programs/psa/key_ladder_demo.sh
+++ b/programs/psa/key_ladder_demo.sh
@@ -23,6 +23,8 @@
 the derived key using an AEAD algorithm.
 EOF
 
+depends_on MBEDTLS_SHA256_C MBEDTLS_MD_C MBEDTLS_AES_C MBEDTLS_CCM_C MBEDTLS_PSA_CRYPTO_C MBEDTLS_FS_IO
+
 program="${0%/*}"/key_ladder_demo
 
 if [ -e master.key ]; then