diff --git a/eo/test/fitness_traits.cpp b/eo/test/fitness_traits.cpp
index 4fad95c47..38c451bc1 100644
--- a/eo/test/fitness_traits.cpp
+++ b/eo/test/fitness_traits.cpp
@@ -407,7 +407,7 @@ void the_main()
   }
 
   // ok, now set the scaling
-  pop1.set_scalef(perf2worth);
+  pop1.setPerf2Worth(perf2worth);
 
   algo(pop1);