diff --git a/src/rendering/transferfunction.cpp b/src/rendering/transferfunction.cpp
index 4d3800be54..7525713ce7 100644
--- a/src/rendering/transferfunction.cpp
+++ b/src/rendering/transferfunction.cpp
@@ -26,6 +26,7 @@
 
 #include <ghoul/filesystem/cachemanager.h>
 #include <ghoul/filesystem/filesystem.h>
+#include <ghoul/filesystem/file.h>
 #include <ghoul/io/texture/texturereader.h>
 #include <ghoul/logging/logmanager.h>
 #include <ghoul/opengl/texture.h>