diff --git a/include/mbgl/style/layer.hpp b/include/mbgl/style/layer.hpp
index 5936422c7..670faa825 100644
--- a/include/mbgl/style/layer.hpp
+++ b/include/mbgl/style/layer.hpp
@@ -4,6 +4,7 @@
 #include <mbgl/style/types.hpp>
 
 #include <memory>
+#include <string>
 
 namespace mbgl {
 namespace style {