diff --git a/cpp/word-count/word_count.h b/cpp/word-count/word_count.h
index 8043872..dfa10cf 100644
--- a/cpp/word-count/word_count.h
+++ b/cpp/word-count/word_count.h
@@ -5,7 +5,7 @@
 
 namespace word_count {
 
-typedef std::map<std::string, size_t> Words;
+typedef std::map<std::string, int> Words;
 
 Words words(const std::string&);