diff --git a/population.py b/population.py
index 1af8dc965318864929e1462d992a0bd7bc746fa5..c16d0101e1233c9ff230563b1ca492f6bf6656fa 100644
--- a/population.py
+++ b/population.py
@@ -55,7 +55,7 @@ class Population:
             y=self.indiv[t]
             vu.add(t)
             vu.add(m)
-            if x.score<=y.score:
+            if x.score>=y.score:
                 newself.append(x)
             else:
                 newself.append(y)