diff --git a/eeschema/bus-wire-junction.cpp b/eeschema/bus-wire-junction.cpp
index c5882810a8..767b78a0e0 100644
--- a/eeschema/bus-wire-junction.cpp
+++ b/eeschema/bus-wire-junction.cpp
@@ -274,7 +274,7 @@ void SCH_EDIT_FRAME::GetSchematicConnections( std::vector< wxPoint >& aConnectio
 
     // We always have some overlapping connection points.  Drop duplicates here
     std::sort( aConnections.begin(), aConnections.end(),
-            []( wxPoint& a, wxPoint& b ) -> bool
+            []( const wxPoint& a, const wxPoint& b ) -> bool
             { return a.x < b.x || (a.x == b.x && a.y < b.y); } );
     aConnections.erase( unique( aConnections.begin(), aConnections.end() ), aConnections.end() );
 }
diff --git a/eeschema/operations_on_items_lists.cpp b/eeschema/operations_on_items_lists.cpp
index 938ce6062c..fcb6efa579 100644
--- a/eeschema/operations_on_items_lists.cpp
+++ b/eeschema/operations_on_items_lists.cpp
@@ -136,7 +136,7 @@ void SCH_EDIT_FRAME::CheckJunctionsInList( PICKED_ITEMS_LIST& aItemsList, bool a
 
     // We always have some overlapping connection points.  Drop duplicates here
     std::sort( pts.begin(), pts.end(),
-            []( wxPoint& a, wxPoint& b ) -> bool
+            []( const wxPoint& a, const wxPoint& b ) -> bool
             { return a.x < b.x || (a.x == b.x && a.y < b.y); } );
     pts.erase( unique( pts.begin(), pts.end() ), pts.end() );