diff --git a/src/univ/slider.cpp b/src/univ/slider.cpp
index 34450b469a..b0d4735ff7 100644
--- a/src/univ/slider.cpp
+++ b/src/univ/slider.cpp
@@ -1019,12 +1019,12 @@ bool wxStdSliderInputHandler::HandleKey(wxInputConsumer *consumer,
                 action = wxACTION_SLIDER_START;
                 break;
 
-            case WXK_RIGHT:
+            case WXK_LEFT:
             case WXK_UP:
                 action = wxACTION_SLIDER_LINE_UP;
                 break;
 
-            case WXK_LEFT:
+            case WXK_RIGHT:
             case WXK_DOWN:
                 action = wxACTION_SLIDER_LINE_DOWN;
                 break;