diff --git a/src/smallmap_gui.cpp b/src/smallmap_gui.cpp
--- a/src/smallmap_gui.cpp
+++ b/src/smallmap_gui.cpp
@@ -1016,7 +1016,7 @@ uint SmallMapWindow::GetLegendHeight(uin
 	}
 }
 
-/* virtual */ void SmallMapWindow::SmallMapWindow::OnInit()
+/* virtual */ void SmallMapWindow::OnInit()
 {
 	uint min_width = 0;
 	this->min_number_of_columns = INDUSTRY_MIN_NUMBER_OF_COLUMNS;