diff --git a/src/osx/button_osx.cpp b/src/osx/button_osx.cpp
index 0a90b0c0b4..6984a9af08 100644
--- a/src/osx/button_osx.cpp
+++ b/src/osx/button_osx.cpp
@@ -131,6 +131,12 @@ bool wxButton::OSXHandleClicked( double WXUNUSED(timestampsec) )
     return true;
 }
 
+/* static */
+wxSize wxButtonBase::GetDefaultSize()
+{
+    return wxAnyButton::GetDefaultSize();
+}
+
 //-------------------------------------------------------
 // wxDisclosureTriangle
 //-------------------------------------------------------