diff --git a/extras/Projucer/Source/ComponentEditor/UI/jucer_ComponentLayoutEditor.cpp b/extras/Projucer/Source/ComponentEditor/UI/jucer_ComponentLayoutEditor.cpp
index ebfc177a17..ab29045e5c 100644
--- a/extras/Projucer/Source/ComponentEditor/UI/jucer_ComponentLayoutEditor.cpp
+++ b/extras/Projucer/Source/ComponentEditor/UI/jucer_ComponentLayoutEditor.cpp
@@ -350,7 +350,7 @@ bool ComponentLayoutEditor::keyPressed (const KeyPress& key)
 bool ComponentLayoutEditor::isInterestedInFileDrag (const StringArray& filenames)
 {
     const File f (filenames [0]);
-    return f.hasFileExtension (".cpp");
+    return f.hasFileExtension (cppFileExtensions);
 }
 
 void ComponentLayoutEditor::filesDropped (const StringArray& filenames, int x, int y)
@@ -394,7 +394,7 @@ void ComponentLayoutEditor::itemDropped (const SourceDetails& dragSourceDetails)
     StringArray filenames;
 
     for (int i = 0; i < selectedNodes.size(); ++i)
-        if (selectedNodes.getUnchecked(i)->getFile().hasFileExtension (".cpp"))
+        if (selectedNodes.getUnchecked(i)->getFile().hasFileExtension (cppFileExtensions))
             filenames.add (selectedNodes.getUnchecked(i)->getFile().getFullPathName());
 
     filesDropped (filenames, dragSourceDetails.localPosition.x, dragSourceDetails.localPosition.y);
diff --git a/extras/Projucer/Source/ComponentEditor/jucer_JucerDocument.cpp b/extras/Projucer/Source/ComponentEditor/jucer_JucerDocument.cpp
index fe05b237f8..42bd145822 100644
--- a/extras/Projucer/Source/ComponentEditor/jucer_JucerDocument.cpp
+++ b/extras/Projucer/Source/ComponentEditor/jucer_JucerDocument.cpp
@@ -645,7 +645,7 @@ XmlElement* JucerDocument::pullMetaDataFromCppFile (const String& cpp)
 
 bool JucerDocument::isValidJucerCppFile (const File& f)
 {
-    if (f.hasFileExtension (".cpp"))
+    if (f.hasFileExtension (cppFileExtensions))
     {
         ScopedPointer<XmlElement> xml (pullMetaDataFromCppFile (f.loadFileAsString()));