diff --git a/pcbnew/zone_filler.cpp b/pcbnew/zone_filler.cpp
index 2ce9751726..fe5097876e 100644
--- a/pcbnew/zone_filler.cpp
+++ b/pcbnew/zone_filler.cpp
@@ -711,7 +711,6 @@ void ZONE_FILLER::buildCopperItemClearances( const ZONE_CONTAINER* aZone, PCB_LA
     // A small extra clearance to be sure actual track clearances are not smaller than
     // requested clearance due to many approximations in calculations, like arc to segment
     // approx, rounding issues, etc.
-    // 1 micron is a good value
     int extra_margin = Millimeter2iu( ADVANCED_CFG::GetCfg().m_ExtraClearance );
 
     BOARD_DESIGN_SETTINGS& bds = m_board->GetDesignSettings();