diff --git a/base b/base
index b4e76037f..be7bbd1f6 160000
--- a/base
+++ b/base
@@ -1 +1 @@
-Subproject commit b4e76037fa8dbe9e6511c07486065f9fec1a96f8
+Subproject commit be7bbd1f69b61313aadac7bfe5273de0581f8378
diff --git a/frontend/document/koptinterface.lua b/frontend/document/koptinterface.lua
index 9945cf795..518aacb93 100644
--- a/frontend/document/koptinterface.lua
+++ b/frontend/document/koptinterface.lua
@@ -153,6 +153,7 @@ function KoptInterface:createContext(doc, pageno, bbox)
     kc:setContrast(1 / doc.configurable.contrast)
     if doc.configurable.white_threshold ~= 255 then
         kc:setWhite(doc.configurable.white_threshold)
+        kc:setPaintWhite(1)
     end
     kc:setDefectSize(doc.configurable.defect_size)
     kc:setLineSpacing(doc.configurable.line_spacing)