diff --git a/src/insets/InsetListings.cpp b/src/insets/InsetListings.cpp
index 57df06e736..67a0462085 100644
--- a/src/insets/InsetListings.cpp
+++ b/src/insets/InsetListings.cpp
@@ -41,6 +41,7 @@
 #include "frontends/alert.h"
 #include "frontends/Application.h"
 
+#include <cstring>
 #include <regex>
 #include <sstream>