diff --git a/src/shell/emscripten.cpp b/src/shell/emscripten.cpp
index 9765fc2ca5..504b3f4ee4 100644
--- a/src/shell/emscripten.cpp
+++ b/src/shell/emscripten.cpp
@@ -4,6 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 
 Author: Leonardo de Moura
 */
+#include <string>
 #include "util/script_state.h"
 #include "util/thread_script_state.h"
 #include "library/module.h"