diff --git a/src/opt_controller.jl b/src/opt_controller.jl
index 07be52e7..a84abc69 100644
--- a/src/opt_controller.jl
+++ b/src/opt_controller.jl
@@ -286,6 +286,7 @@ function run_optimization(ctrl::OptRunController, params::Associative)
   catch ex
     # If it was a ctrl-c interrupt we try to make a result and return it...
     if isa(ex, InterruptException)
+      warn("Optimization interrupted, recovering intermediate results...")
       return make_opt_result(ctrl, params)
     else
       rethrow(ex)