diff --git a/crypto/block-luks.c b/crypto/block-luks.c
index afb8543108..c3cacdb1ed 100644
--- a/crypto/block-luks.c
+++ b/crypto/block-luks.c
@@ -20,6 +20,7 @@
 
 #include "qemu/osdep.h"
 #include "qapi/error.h"
+#include "qapi/util.h"
 #include "qemu/bswap.h"
 
 #include "crypto/block-luks.h"
@@ -265,39 +266,33 @@ qcrypto_block_luks_cipher_alg_lookup(QCryptoCipherAlgorithm alg,
  * make that function emit a more friendly error message */
 static int qcrypto_block_luks_name_lookup(const char *name,
                                           const char *const *map,
-                                          size_t maplen,
                                           const char *type,
                                           Error **errp)
 {
-    size_t i;
-    for (i = 0; i < maplen; i++) {
-        if (g_str_equal(map[i], name)) {
-            return i;
-        }
-    }
+    int ret = qapi_enum_parse(map, name, -1, NULL);
 
-    error_setg(errp, "%s %s not supported", type, name);
-    return 0;
+    if (ret < 0) {
+        error_setg(errp, "%s %s not supported", type, name);
+        return 0;
+    }
+    return ret;
 }
 
 #define qcrypto_block_luks_cipher_mode_lookup(name, errp)               \
     qcrypto_block_luks_name_lookup(name,                                \
                                    QCryptoCipherMode_lookup,            \
-                                   QCRYPTO_CIPHER_MODE__MAX,            \
                                    "Cipher mode",                       \
                                    errp)
 
 #define qcrypto_block_luks_hash_name_lookup(name, errp)                 \
     qcrypto_block_luks_name_lookup(name,                                \
                                    QCryptoHashAlgorithm_lookup,         \
-                                   QCRYPTO_HASH_ALG__MAX,               \
                                    "Hash algorithm",                    \
                                    errp)
 
 #define qcrypto_block_luks_ivgen_name_lookup(name, errp)                \
     qcrypto_block_luks_name_lookup(name,                                \
                                    QCryptoIVGenAlgorithm_lookup,        \
-                                   QCRYPTO_IVGEN_ALG__MAX,              \
                                    "IV generator",                      \
                                    errp)