diff --git a/modules/juce_graphics/images/juce_Image.h b/modules/juce_graphics/images/juce_Image.h
index 6e07b20c7b..82afa25b0c 100644
--- a/modules/juce_graphics/images/juce_Image.h
+++ b/modules/juce_graphics/images/juce_Image.h
@@ -307,7 +307,7 @@ public:
         The actual format of the pixel data depends on the image's format - see Image::getFormat(),
         and the PixelRGB, PixelARGB and PixelAlpha classes for more info.
     */
-    class BitmapData
+    class JUCE_API  BitmapData
     {
     public:
         enum ReadWriteMode
diff --git a/modules/juce_gui_basics/widgets/juce_TextEditor.h b/modules/juce_gui_basics/widgets/juce_TextEditor.h
index 4426fff343..75cd3b19f8 100644
--- a/modules/juce_gui_basics/widgets/juce_TextEditor.h
+++ b/modules/juce_gui_basics/widgets/juce_TextEditor.h
@@ -532,7 +532,7 @@ public:
     /** Base class for input filters that can be applied to a TextEditor to restrict
         the text that can be entered.
     */
-    class InputFilter
+    class JUCE_API  InputFilter
     {
     public:
         InputFilter() {}
diff --git a/modules/juce_gui_extra/code_editor/juce_CodeEditorComponent.h b/modules/juce_gui_extra/code_editor/juce_CodeEditorComponent.h
index 4b3e3c1e84..774aa36dfb 100644
--- a/modules/juce_gui_extra/code_editor/juce_CodeEditorComponent.h
+++ b/modules/juce_gui_extra/code_editor/juce_CodeEditorComponent.h
@@ -206,7 +206,7 @@ public:
     const Font& getFont() const noexcept                { return font; }
 
     //==============================================================================
-    struct ColourScheme
+    struct JUCE_API  ColourScheme
     {
         struct TokenType
         {