diff --git a/src/template.h b/src/template.h
index bf44267d..feef5784 100644
--- a/src/template.h
+++ b/src/template.h
@@ -34,6 +34,7 @@
 #include <array>
 #include <functional>
 #include <typeinfo>
+#include <algorithm>
 
 namespace nghttp2 {