diff --git a/java/src/com/android/inputmethod/latin/utils/LanguageModelParam.java b/java/src/com/android/inputmethod/latin/utils/LanguageModelParam.java
index 3a5af4b..a1d6415 100644
--- a/java/src/com/android/inputmethod/latin/utils/LanguageModelParam.java
+++ b/java/src/com/android/inputmethod/latin/utils/LanguageModelParam.java
@@ -25,7 +25,9 @@
 import java.util.ArrayList;
 import java.util.Locale;
 
-public class LanguageModelParam {
+// Note: this class is used as a parameter type of a native method. You should be careful when you
+// rename this class or field name. See BinaryDictionary#addMultipleDictionaryEntriesNative().
+public final class LanguageModelParam {
     private static final String TAG = LanguageModelParam.class.getSimpleName();
     private static final boolean DEBUG = false;
     private static final boolean DEBUG_TOKEN = false;
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index 716bda5..26570f4 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -541,7 +541,7 @@
     {
         const_cast<char *>("addMultipleDictionaryEntriesNative"),
         const_cast<char *>(
-                "(J[Lcom/android/inputmethod/latin/BinaryDictionary$LanguageModelParam;I)I"),
+                "(J[Lcom/android/inputmethod/latin/utils/LanguageModelParam;I)I"),
         reinterpret_cast<void *>(latinime_BinaryDictionary_addMultipleDictionaryEntries)
     },
     {