diff --git a/include/openspace/util/json_helper.h b/include/openspace/util/json_helper.h
index 00e5f62b6c..af656d89ee 100644
--- a/include/openspace/util/json_helper.h
+++ b/include/openspace/util/json_helper.h
@@ -27,6 +27,7 @@
 
 #include <string>
 #include <openspace/json.h>
+#include <ghoul/misc/dictionary.h>
 
 namespace openspace {