diff --git a/src/insert_completer.cc b/src/insert_completer.cc
index ad32bf30..126ab57c 100644
--- a/src/insert_completer.cc
+++ b/src/insert_completer.cc
@@ -11,7 +11,7 @@
 #include "window.hh"
 #include "word_db.hh"
 
-#include <algorithm>
+#include <numeric>
 
 namespace Kakoune
 {