diff --git a/lib/OptimizationMetaheuristics/src/OptimizationMetaheuristics.jl b/lib/OptimizationMetaheuristics/src/OptimizationMetaheuristics.jl
index 764e8a1b8..d980fcd80 100644
--- a/lib/OptimizationMetaheuristics/src/OptimizationMetaheuristics.jl
+++ b/lib/OptimizationMetaheuristics/src/OptimizationMetaheuristics.jl
@@ -107,9 +107,14 @@ function SciMLBase.__solve(cache::OptimizationCache{
     maxiters = Optimization._check_and_convert_maxiters(cache.solver_args.maxiters)
     maxtime = Optimization._check_and_convert_maxtime(cache.solver_args.maxtime)
 
+    f=cache.f
     _loss = function (θ)
-        x = cache.f(θ, cache.p)
-        return first(x)
+        if isa(f,MultiObjectiveOptimizationFunction)
+            return cache.f(θ, cache.p)
+        else
+            x = cache.f(θ, cache.p)
+            return first(x)
+        end
     end
 
     if !isnothing(cache.lb) & !isnothing(cache.ub)