diff --git a/src/osmtag.hpp b/src/osmtag.hpp
index cdfb098..058695e 100644
--- a/src/osmtag.hpp
+++ b/src/osmtag.hpp
@@ -1,6 +1,7 @@
 #pragma once
 
 #include <string>
+#include <vector>
 
 namespace osmp
 {