diff --git a/ext/ghoul b/ext/ghoul
index e0cbca16ad..445ed6353f 160000
--- a/ext/ghoul
+++ b/ext/ghoul
@@ -1 +1 @@
-Subproject commit e0cbca16ad71700cf82d0d24bcf4fc14bded10ea
+Subproject commit 445ed6353fe53ffc2f799de29328ca44de9e3ffb
diff --git a/include/openspace/engine/moduleengine.h b/include/openspace/engine/moduleengine.h
index 1cba4abc48..ab3a118ecc 100644
--- a/include/openspace/engine/moduleengine.h
+++ b/include/openspace/engine/moduleengine.h
@@ -28,6 +28,8 @@
 #include <memory>
 #include <vector>
 
+#include <openspace/util/openspacemodule.h>
+
 namespace ghoul {
 namespace systemcapabilities {
 
@@ -40,8 +42,6 @@ namespace openspace {
 
 namespace scripting { struct LuaLibrary; }
 
-class OpenSpaceModule;
-
 /**
  * The ModuleEngine is the central repository for registering and accessing
  * OpenSpaceModule for the current application run. By initializing (#initialize) the