diff --git a/native/jni/src/suggest/policyimpl/dictionary/header/header_read_write_utils.cpp b/native/jni/src/suggest/policyimpl/dictionary/header/header_read_write_utils.cpp
index 2694ce8..5ded8f6 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/header/header_read_write_utils.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/header/header_read_write_utils.cpp
@@ -139,6 +139,9 @@
         int *const writingPos) {
     for (AttributeMap::const_iterator it = headerAttributes->begin();
             it != headerAttributes->end(); ++it) {
+        if (it->first.empty() || it->second.empty()) {
+            continue;
+        }
         // Write a key.
         if (!buffer->writeCodePointsAndAdvancePosition(&(it->first.at(0)), it->first.size(),
                 true /* writesTerminator */, writingPos)) {