diff --git a/generator/osm2type.cpp b/generator/osm2type.cpp
index fde3a51da0..c83f69fb2c 100644
--- a/generator/osm2type.cpp
+++ b/generator/osm2type.cpp
@@ -479,6 +479,8 @@ string DetermineSurface(OsmElement * p)
       surface_grade = tag.m_value;
     else if (tag.m_key == "highway")
       isHighway = true;
+    else if (tag.m_key == "4wd_only" && (tag.m_value == "yes" || tag.m_value == "recommended"))
+      return "unpaved_bad";
   }
 
   if (!isHighway || (surface.empty() && smoothness.empty()))