diff --git a/src/evaluate.cpp b/src/evaluate.cpp
index f6764b18..6783ffd8 100644
--- a/src/evaluate.cpp
+++ b/src/evaluate.cpp
@@ -765,6 +765,7 @@ namespace {
                     +  8 * pe->pawn_asymmetry()
                     + 12 * pos.count<PAWN>()
                     + 16 * pawnsOnBothFlanks
+                    + 48 * !pos.non_pawn_material()
                     -136 ;
 
     // Now apply the bonus: note that we find the attacking side by extracting