diff --git a/include/wx/dlimpexp.h b/include/wx/dlimpexp.h
index a5daab8ed9..3c0a823edd 100644
--- a/include/wx/dlimpexp.h
+++ b/include/wx/dlimpexp.h
@@ -132,12 +132,23 @@
 #ifdef WXMAKINGDLL_CORE
 #    define WXDLLIMPEXP_CORE WXEXPORT
 #    define WXDLLIMPEXP_DATA_CORE(type) WXEXPORT type
+#    if defined(HAVE_VISIBILITY)
+#        define WXDLLIMPEXP_INLINE_CORE WXEXPORT
+#    else
+#        define WXDLLIMPEXP_INLINE_CORE
+#    endif
 #elif defined(WXUSINGDLL)
 #    define WXDLLIMPEXP_CORE WXIMPORT
 #    define WXDLLIMPEXP_DATA_CORE(type) WXIMPORT type
+#    if defined(HAVE_VISIBILITY)
+#        define WXDLLIMPEXP_INLINE_CORE WXIMPORT
+#    else
+#        define WXDLLIMPEXP_INLINE_CORE
+#    endif
 #else /* not making nor using DLL */
 #    define WXDLLIMPEXP_CORE
 #    define WXDLLIMPEXP_DATA_CORE(type) type
+#    define WXDLLIMPEXP_INLINE_CORE
 #endif
 
 #ifdef WXMAKINGDLL_ADV
diff --git a/include/wx/osx/core/colour.h b/include/wx/osx/core/colour.h
index 582d36ec3e..3c6674c589 100644
--- a/include/wx/osx/core/colour.h
+++ b/include/wx/osx/core/colour.h
@@ -32,10 +32,10 @@ public:
     // accessors
     virtual bool IsOk() const { return m_cgColour; }
 
-    ChannelType Red() const { return m_red; }
-    ChannelType Green() const { return m_green; }
-    ChannelType Blue() const { return m_blue; }
-    ChannelType Alpha() const { return m_alpha; }
+    virtual WXDLLIMPEXP_INLINE_CORE ChannelType Red() const { return m_red; }
+    virtual WXDLLIMPEXP_INLINE_CORE ChannelType Green() const { return m_green; }
+    virtual WXDLLIMPEXP_INLINE_CORE ChannelType Blue() const { return m_blue; }
+    virtual WXDLLIMPEXP_INLINE_CORE ChannelType Alpha() const { return m_alpha; }
 
     // comparison
     bool operator == (const wxColour& colour) const;