diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index b1e26162..5a28b286 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -605,6 +605,8 @@ namespace {
 
                 mbonus += k * rr, ebonus += k * rr;
             }
+            else if(pos.pieces(Us) & blockSq)
+                mbonus += rr * 3 + r * 2 + 3, ebonus += rr + r * 2;
         } // rr != 0
 
         if (pos.count<PAWN>(Us) < pos.count<PAWN>(Them))