diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index 876b43958..7e1e0e424 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -170,10 +170,10 @@ static int latinime_BinaryDictionary_getSuggestions(JNIEnv *env, jobject object,
     int spaceIndices[spaceIndicesLength];
     const jsize outputTypesLength = env->GetArrayLength(outputTypesArray);
     int outputTypes[outputTypesLength];
-    memset(outputChars, 0, outputCharsLength);
-    memset(scores, 0, scoresLength);
-    memset(spaceIndices, 0, spaceIndicesLength);
-    memset(outputTypes, 0, outputTypesLength);
+    memset(outputChars, 0, outputCharsLength * sizeof(outputChars[0]));
+    memset(scores, 0, scoresLength * sizeof(scores[0]));
+    memset(spaceIndices, 0, spaceIndicesLength * sizeof(spaceIndices[0]));
+    memset(outputTypes, 0, outputTypesLength * sizeof(outputTypes[0]));
 
     int count;
     if (isGesture || arraySize > 1) {
diff --git a/native/jni/src/proximity_info.cpp b/native/jni/src/proximity_info.cpp
index 2633913f7..18a0b74a8 100644
--- a/native/jni/src/proximity_info.cpp
+++ b/native/jni/src/proximity_info.cpp
@@ -34,7 +34,7 @@ static inline void safeGetOrFillZeroIntArrayRegion(JNIEnv *env, jintArray jArray
     if (jArray && buffer) {
         env->GetIntArrayRegion(jArray, 0, len, buffer);
     } else if (buffer) {
-        memset(buffer, 0, len);
+        memset(buffer, 0, len * sizeof(jint));
     }
 }
 
@@ -43,7 +43,7 @@ static inline void safeGetOrFillZeroFloatArrayRegion(JNIEnv *env, jfloatArray jA
     if (jArray && buffer) {
         env->GetFloatArrayRegion(jArray, 0, len, buffer);
     } else if (buffer) {
-        memset(buffer, 0, len);
+        memset(buffer, 0, len * sizeof(jfloat));
     }
 }