diff --git a/extras/Introjucer/Source/Project/jucer_Module.cpp b/extras/Introjucer/Source/Project/jucer_Module.cpp
index c6ded93dfa..86a9dd14fe 100644
--- a/extras/Introjucer/Source/Project/jucer_Module.cpp
+++ b/extras/Introjucer/Source/Project/jucer_Module.cpp
@@ -794,6 +794,11 @@ EnabledModuleList::EnabledModuleList (Project& p, const ValueTree& s)
 {
 }
 
+EnabledModuleList::EnabledModuleList (const EnabledModuleList& other)
+    : project (other.project), state (other.state)
+{
+}
+
 const Identifier EnabledModuleList::modulesGroupTag ("MODULES");
 const Identifier EnabledModuleList::moduleTag ("MODULE");
 
diff --git a/extras/Introjucer/Source/Project/jucer_Module.h b/extras/Introjucer/Source/Project/jucer_Module.h
index 079207e5f9..236324e7e9 100644
--- a/extras/Introjucer/Source/Project/jucer_Module.h
+++ b/extras/Introjucer/Source/Project/jucer_Module.h
@@ -153,6 +153,7 @@ class EnabledModuleList
 {
 public:
     EnabledModuleList (Project&, const ValueTree&);
+    EnabledModuleList (const EnabledModuleList&);
 
     bool isModuleEnabled (const String& moduleID) const;
     Value shouldShowAllModuleFilesInProject (const String& moduleID);
@@ -175,6 +176,8 @@ private:
     ValueTree state;
 
     UndoManager* getUndoManager() const     { return project.getUndoManagerFor (state); }
+
+    EnabledModuleList& operator= (const EnabledModuleList&) JUCE_DELETED_FUNCTION;
 };