diff --git a/fs_mgr/fs_mgr_fstab.cpp b/fs_mgr/fs_mgr_fstab.cpp
index c9fb7aa..4ff39ab 100644
--- a/fs_mgr/fs_mgr_fstab.cpp
+++ b/fs_mgr/fs_mgr_fstab.cpp
@@ -114,9 +114,11 @@
 #define EM_ICE          2
 #define EM_AES_256_CTS  3
 #define EM_AES_256_HEH  4
+#define EM_ADIANTUM     5
 
 static const struct flag_list file_contents_encryption_modes[] = {
     {"aes-256-xts", EM_AES_256_XTS},
+    {"adiantum", EM_ADIANTUM},
     {"software", EM_AES_256_XTS}, /* alias for backwards compatibility */
     {"ice", EM_ICE}, /* hardware-specific inline cryptographic engine */
     {0, 0},
@@ -125,6 +127,7 @@
 static const struct flag_list file_names_encryption_modes[] = {
     {"aes-256-cts", EM_AES_256_CTS},
     {"aes-256-heh", EM_AES_256_HEH},
+    {"adiantum", EM_ADIANTUM},
     {0, 0},
 };
 
@@ -273,6 +276,8 @@
                         flag_vals->file_names_mode =
                             encryption_mode_to_flag(file_names_encryption_modes,
                                                     colon + 1, "file names");
+                    } else if (flag_vals->file_contents_mode == EM_ADIANTUM) {
+                        flag_vals->file_names_mode = EM_ADIANTUM;
                     } else {
                         flag_vals->file_names_mode = EM_AES_256_CTS;
                     }