diff --git a/src/highlighters.cc b/src/highlighters.cc
index e1e4205a..1ef9dfaf 100644
--- a/src/highlighters.cc
+++ b/src/highlighters.cc
@@ -18,6 +18,7 @@
 #include "utf8_iterator.hh"
 
 #include <locale>
+#include <cstdio>
 
 namespace Kakoune
 {