1 files changed, 3 insertions, 3 deletions
diff --git a/decoder/ff_charset.cc b/decoder/ff_charset.cc
index 33afc1a7..472de82b 100644
--- a/decoder/ff_charset.cc
+++ b/decoder/ff_charset.cc
@@ -7,9 +7,9 @@ using namespace std;
 
 NonLatinCount::NonLatinCount(const string& param) : FeatureFunction(), fid_(FD::Convert("NonLatinCount")) {}
 
-bool ContainsNonLatin(const char* word) {
-  int cur = 0;
-  while(word[cur]) {
+bool ContainsNonLatin(const string& word) {
+  unsigned cur = 0;
+  while(cur < word.size()) {
     const int size = UTF8Len(word[cur]);
     if (size > 1) return true;
     cur += size;