From cac334bb45ce663554e5f424779d20fac22dd3db Mon Sep 17 00:00:00 2001
From: Seth Hillbrand <seth@kipro-pcb.com>
Date: Sat, 23 Aug 2025 07:43:36 -0700
Subject: [PATCH] Enforce board-level hole to hole on diff pairs

Makes the router behave like the DRC

Fixes https://gitlab.com/kicad/code/kicad/-/issues/21240
---
 pcbnew/router/pns_kicad_iface.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pcbnew/router/pns_kicad_iface.cpp b/pcbnew/router/pns_kicad_iface.cpp
index 5bde1a01aa..b4a2e9b835 100644
--- a/pcbnew/router/pns_kicad_iface.cpp
+++ b/pcbnew/router/pns_kicad_iface.cpp
@@ -861,7 +861,7 @@ bool PNS_KICAD_IFACE_BASE::ImportSizes( PNS::SIZES_SETTINGS& aSizes, PNS::ITEM*
         holeToHoleMin = constraint.m_Value.Min();
     }
 
-    aSizes.SetDiffPairHoleToHole( holeToHoleMin );
+    aSizes.SetDiffPairHoleToHole( std::max( holeToHoleMin, aSizes.GetHoleToHole() ) );
 
     return true;
 }