diff --git a/native/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp b/native/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp
index 30ca3f1b8..3c482ca58 100644
--- a/native/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp
+++ b/native/jni/com_android_inputmethod_keyboard_ProximityInfo.cpp
@@ -43,9 +43,12 @@ static void latinime_Keyboard_release(JNIEnv *env, jclass clazz, jlong proximity
 }
 
 static JNINativeMethod sMethods[] = {
-    {"setProximityInfoNative", "(Ljava/lang/String;IIIII[II[I[I[I[I[I[F[F[F)J",
-            reinterpret_cast<void *>(latinime_Keyboard_setProximityInfo)},
-    {"releaseProximityInfoNative", "(J)V", reinterpret_cast<void *>(latinime_Keyboard_release)}
+    {const_cast<char *>("setProximityInfoNative"),
+     const_cast<char *>("(Ljava/lang/String;IIIII[II[I[I[I[I[I[F[F[F)J"),
+     reinterpret_cast<void *>(latinime_Keyboard_setProximityInfo)},
+    {const_cast<char *>("releaseProximityInfoNative"),
+     const_cast<char *>("(J)V"),
+     reinterpret_cast<void *>(latinime_Keyboard_release)}
 };
 
 int register_ProximityInfo(JNIEnv *env) {
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index 9321c4b8c..11fa3da3a 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -280,19 +280,27 @@ static void releaseDictBuf(const void *dictBuf, const size_t length, const int f
 }
 
 static JNINativeMethod sMethods[] = {
-    {"openNative", "(Ljava/lang/String;JJ)J",
-            reinterpret_cast<void *>(latinime_BinaryDictionary_open)},
-    {"closeNative", "(J)V", reinterpret_cast<void *>(latinime_BinaryDictionary_close)},
-    {"getSuggestionsNative", "(JJJ[I[I[I[I[IIIZ[IZ[I[I[I[I)I",
-            reinterpret_cast<void *>(latinime_BinaryDictionary_getSuggestions)},
-    {"getProbabilityNative", "(J[I)I",
-            reinterpret_cast<void *>(latinime_BinaryDictionary_getProbability)},
-    {"isValidBigramNative", "(J[I[I)Z",
-            reinterpret_cast<void *>(latinime_BinaryDictionary_isValidBigram)},
-    {"calcNormalizedScoreNative", "([I[II)F",
-            reinterpret_cast<void *>(latinime_BinaryDictionary_calcNormalizedScore)},
-    {"editDistanceNative", "([I[I)I",
-            reinterpret_cast<void *>(latinime_BinaryDictionary_editDistance)}
+    {const_cast<char *>("openNative"),
+     const_cast<char *>("(Ljava/lang/String;JJ)J"),
+     reinterpret_cast<void *>(latinime_BinaryDictionary_open)},
+    {const_cast<char *>("closeNative"),
+     const_cast<char *>("(J)V"),
+     reinterpret_cast<void *>(latinime_BinaryDictionary_close)},
+    {const_cast<char *>("getSuggestionsNative"),
+     const_cast<char *>("(JJJ[I[I[I[I[IIIZ[IZ[I[I[I[I)I"),
+     reinterpret_cast<void *>(latinime_BinaryDictionary_getSuggestions)},
+    {const_cast<char *>("getProbabilityNative"),
+     const_cast<char *>("(J[I)I"),
+     reinterpret_cast<void *>(latinime_BinaryDictionary_getProbability)},
+    {const_cast<char *>("isValidBigramNative"),
+     const_cast<char *>("(J[I[I)Z"),
+     reinterpret_cast<void *>(latinime_BinaryDictionary_isValidBigram)},
+    {const_cast<char *>("calcNormalizedScoreNative"),
+     const_cast<char *>("([I[II)F"),
+     reinterpret_cast<void *>(latinime_BinaryDictionary_calcNormalizedScore)},
+    {const_cast<char *>("editDistanceNative"),
+     const_cast<char *>("([I[I)I"),
+     reinterpret_cast<void *>(latinime_BinaryDictionary_editDistance)}
 };
 
 int register_BinaryDictionary(JNIEnv *env) {
diff --git a/native/jni/com_android_inputmethod_latin_DicTraverseSession.cpp b/native/jni/com_android_inputmethod_latin_DicTraverseSession.cpp
index 9b39245b9..dfe3b09d8 100644
--- a/native/jni/com_android_inputmethod_latin_DicTraverseSession.cpp
+++ b/native/jni/com_android_inputmethod_latin_DicTraverseSession.cpp
@@ -48,12 +48,15 @@ static void latinime_releaseDicTraverseSession(JNIEnv *env, jclass clazz, jlong
 }
 
 static JNINativeMethod sMethods[] = {
-    {"setDicTraverseSessionNative", "(Ljava/lang/String;)J",
-            reinterpret_cast<void *>(latinime_setDicTraverseSession)},
-    {"initDicTraverseSessionNative", "(JJ[II)V",
-            reinterpret_cast<void *>(latinime_initDicTraverseSession)},
-    {"releaseDicTraverseSessionNative", "(J)V",
-            reinterpret_cast<void *>(latinime_releaseDicTraverseSession)}
+    {const_cast<char *>("setDicTraverseSessionNative"),
+     const_cast<char *>("(Ljava/lang/String;)J"),
+     reinterpret_cast<void *>(latinime_setDicTraverseSession)},
+    {const_cast<char *>("initDicTraverseSessionNative"),
+     const_cast<char *>("(JJ[II)V"),
+     reinterpret_cast<void *>(latinime_initDicTraverseSession)},
+    {const_cast<char *>("releaseDicTraverseSessionNative"),
+     const_cast<char *>("(J)V"),
+     reinterpret_cast<void *>(latinime_releaseDicTraverseSession)}
 };
 
 int register_DicTraverseSession(JNIEnv *env) {