diff --git a/pcbnew/tools/board_inspection_tool.h b/pcbnew/tools/board_inspection_tool.h
index d0f0bce76f..34673cb170 100644
--- a/pcbnew/tools/board_inspection_tool.h
+++ b/pcbnew/tools/board_inspection_tool.h
@@ -120,8 +120,7 @@ private:
     ///< Bind handlers to corresponding TOOL_ACTIONs.
     void setTransitions() override;
 
-    std::unique_ptr<DRC_ENGINE> makeDRCEngine( bool* aCompileError,
-                                               bool* aCourtyardError = nullptr );
+    std::unique_ptr<DRC_ENGINE> makeDRCEngine( bool* aCompileError, bool* aCourtyardError );
 
     wxString getItemDescription( BOARD_ITEM* aItem );