diff --git a/libraries/core/src/main/java/uk/ac/kcl/inf/mdeoptimiser/libraries/core/optimisation/moea/operators/MoeaProbabilisticVariation.java b/libraries/core/src/main/java/uk/ac/kcl/inf/mdeoptimiser/libraries/core/optimisation/moea/operators/MoeaProbabilisticVariation.java
index 0895fcfb6..22d711700 100644
--- a/libraries/core/src/main/java/uk/ac/kcl/inf/mdeoptimiser/libraries/core/optimisation/moea/operators/MoeaProbabilisticVariation.java
+++ b/libraries/core/src/main/java/uk/ac/kcl/inf/mdeoptimiser/libraries/core/optimisation/moea/operators/MoeaProbabilisticVariation.java
@@ -59,8 +59,8 @@ public Solution[] evolve(Solution[] parents) {
         System.out.println("Not running mutation this run");
       }
     }
-
-    return (Solution[]) solutions.toArray();
+    Solution[] solutionArray = new Solution[solutions.size()];
+    return solutions.toArray(solutionArray);
   }
 
   /**