diff --git a/Disk.cpp b/Disk.cpp
index b424aba..9c22400 100644
--- a/Disk.cpp
+++ b/Disk.cpp
@@ -24,6 +24,7 @@
 #include "Ext4Crypt.h"
 
 #include <android-base/file.h>
+#include <android-base/properties.h>
 #include <android-base/stringprintf.h>
 #include <android-base/logging.h>
 #include <diskconfig/diskconfig.h>
@@ -446,7 +447,8 @@
 status_t Disk::partitionMixed(int8_t ratio) {
     int res;
 
-    if (e4crypt_is_native()) {
+    if (e4crypt_is_native()
+            && !android::base::GetBoolProperty("persist.sys.adoptable_fbe", false)) {
         LOG(ERROR) << "Private volumes not yet supported on FBE devices";
         return -EINVAL;
     }
@@ -469,9 +471,14 @@
     // We've had some success above, so generate both the private partition
     // GUID and encryption key and persist them.
     std::string partGuidRaw;
+    if (GenerateRandomUuid(partGuidRaw) != OK) {
+        LOG(ERROR) << "Failed to generate GUID";
+        return -EIO;
+    }
+
     std::string keyRaw;
-    if (ReadRandomBytes(16, partGuidRaw) || ReadRandomBytes(16, keyRaw)) {
-        LOG(ERROR) << "Failed to generate GUID or key";
+    if (ReadRandomBytes(16, keyRaw) != OK) {
+        LOG(ERROR) << "Failed to generate key";
         return -EIO;
     }