diff --git a/src/openrct2/core/Imaging.cpp b/src/openrct2/core/Imaging.cpp
index 37e5e25173..e933ae0b27 100644
--- a/src/openrct2/core/Imaging.cpp
+++ b/src/openrct2/core/Imaging.cpp
@@ -20,6 +20,7 @@
 #include <fstream>
 #include <stdexcept>
 #include <streambuf>
+#include <unordered_map>
 #include <png.h>
 #include "FileStream.hpp"
 #include "Guard.hpp"