diff --git a/services/core/java/com/android/server/MountService.java b/services/core/java/com/android/server/MountService.java
index 65a22b9a29e94..ccca5baa798a3 100644
--- a/services/core/java/com/android/server/MountService.java
+++ b/services/core/java/com/android/server/MountService.java
@@ -1946,6 +1946,10 @@ class MountService extends IMountService.Stub
                 throw new IllegalStateException(
                         "Emulation not available on device with native FBE");
             }
+            if (mLockPatternUtils.isCredentialRequiredToDecrypt(false)) {
+                throw new IllegalStateException(
+                        "Emulation requires disabling 'Secure start-up' in Settings > Security");
+            }
 
             final long token = Binder.clearCallingIdentity();
             try {