diff --git a/api/current.txt b/api/current.txt
index 7228ef42dd3af..f1529aa6e15f1 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -24942,6 +24942,7 @@ package android.media {
     ctor public MediaDrm.SessionException(int, @Nullable String);
     method public int getErrorCode();
     field public static final int ERROR_RESOURCE_CONTENTION = 1; // 0x1
+    field public static final int ERROR_UNKNOWN = 0; // 0x0
   }
 
   public class MediaDrmException extends java.lang.Exception {
diff --git a/media/java/android/media/MediaDrm.java b/media/java/android/media/MediaDrm.java
index aeb77cfddbbde..005f2d47367b8 100644
--- a/media/java/android/media/MediaDrm.java
+++ b/media/java/android/media/MediaDrm.java
@@ -303,6 +303,11 @@ public final class MediaDrm implements AutoCloseable {
             mErrorCode = errorCode;
         }
 
+        /**
+         * The SessionException has an unknown error code.
+         */
+        public static final int ERROR_UNKNOWN = 0;
+
         /**
          * This indicates that apps using MediaDrm sessions are
          * temporarily exceeding the capacity of available crypto
diff --git a/media/jni/android_media_MediaDrm.cpp b/media/jni/android_media_MediaDrm.cpp
index d7ab854d63ba8..f412161f418a2 100644
--- a/media/jni/android_media_MediaDrm.cpp
+++ b/media/jni/android_media_MediaDrm.cpp
@@ -149,6 +149,7 @@ struct SessionExceptionFields {
 };
 
 struct SessionExceptionErrorCodes {
+    jint kErrorUnknown;
     jint kResourceContention;
 } gSessionExceptionErrorCodes;
 
@@ -888,6 +889,8 @@ static void android_media_MediaDrm_native_init(JNIEnv *env) {
     gFields.sessionException.classId = static_cast<jclass>(env->NewGlobalRef(clazz));
     GET_FIELD_ID(gFields.sessionException.errorCode, clazz, "mErrorCode", "I");
 
+    GET_STATIC_FIELD_ID(field, clazz, "ERROR_UNKNOWN", "I");
+    gSessionExceptionErrorCodes.kErrorUnknown = env->GetStaticIntField(clazz, field);
     GET_STATIC_FIELD_ID(field, clazz, "ERROR_RESOURCE_CONTENTION", "I");
     gSessionExceptionErrorCodes.kResourceContention = env->GetStaticIntField(clazz, field);
 }