diff --git a/src/osx/carbon/combobox.cpp b/src/osx/carbon/combobox.cpp
index 387f7402a5..73bbbad274 100644
--- a/src/osx/carbon/combobox.cpp
+++ b/src/osx/carbon/combobox.cpp
@@ -58,7 +58,7 @@ protected:
         {
             wxNavigationKeyEvent NavEvent;
             NavEvent.SetEventObject(this);
-            NavEvent.SetDirection(true);
+            NavEvent.SetDirection(!event.ShiftDown());
             NavEvent.SetWindowChange(false);
 
             // Get the parent of the combo and have it process the navigation?