diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionary.java b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
index 38359fc15..a351ee974 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
@@ -151,6 +151,8 @@ public final class BinaryDictionary extends Dictionary {
 
     private static native long openNative(String sourceDir, long dictOffset, long dictSize,
             boolean isUpdatable);
+    private static native long createOnMemoryNative(long formatVersion,
+            String locale, String[] attributeKeyStringArray, String[] attributeValueStringArray);
     private static native void getHeaderInfoNative(long dict, int[] outHeaderSize,
             int[] outFormatVersion, ArrayList<int[]> outAttributeKeys,
             ArrayList<int[]> outAttributeValues);
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index 0cb66146f..b2946da9c 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -65,6 +65,13 @@ static jlong latinime_BinaryDictionary_open(JNIEnv *env, jclass clazz, jstring s
     return reinterpret_cast<jlong>(dictionary);
 }
 
+static jlong latinime_BinaryDictionary_createOnMemory(JNIEnv *env, jclass clazz,
+        jlong formatVersion, jstring locale, jobjectArray attributeKeyStringArray,
+        jobjectArray attributeValueStringArray) {
+    // TODO: Implement.
+    return 0;
+}
+
 static void latinime_BinaryDictionary_flush(JNIEnv *env, jclass clazz, jlong dict,
         jstring filePath) {
     Dictionary *dictionary = reinterpret_cast<Dictionary *>(dict);
@@ -467,6 +474,11 @@ static const JNINativeMethod sMethods[] = {
         const_cast<char *>("(Ljava/lang/String;JJZ)J"),
         reinterpret_cast<void *>(latinime_BinaryDictionary_open)
     },
+    {
+        const_cast<char *>("createOnMemoryNative"),
+        const_cast<char *>("(JLjava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)J"),
+        reinterpret_cast<void *>(latinime_BinaryDictionary_createOnMemory)
+    },
     {
         const_cast<char *>("closeNative"),
         const_cast<char *>("(J)V"),