1 files changed, 1 insertions, 1 deletions
diff --git a/src/gui.h b/src/gui.h
index 4600219cc..5e7fc5354 100644
--- a/src/gui.h
+++ b/src/gui.h
@@ -65,7 +65,7 @@ void ShowIndustryDirectory();
 void ShowSubsidiesList();
 
 void ShowEstimatedCostOrIncome(Money cost, int x, int y);
-void ShowErrorMessage(StringID detailed_msg, StringID summary_msg, int x, int y, bool no_timeout = false);
+void ShowErrorMessage(StringID summary_msg, StringID detailed_msg, int x, int y, bool no_timeout = false);
 
 void ShowSmallMap();
 void ShowExtraViewPortWindow(TileIndex tile = INVALID_TILE);