diff --git a/src/spellers/HunspellInterface.cpp b/src/spellers/HunspellInterface.cpp
index 3485f59..c032d9f 100644
--- a/src/spellers/HunspellInterface.cpp
+++ b/src/spellers/HunspellInterface.cpp
@@ -34,6 +34,8 @@ void append_word_to_user_dictionary(const wchar_t *dictionary_path, const char *
     return;
 
   auto fp = _wfopen(dictionary_path, L"a");
+  if (!fp)
+    return;
   fprintf(fp, "%s\n", word);
   fclose(fp);
 }