diff --git a/matlab/perfect-foresight-models/private/simulation_core.m b/matlab/perfect-foresight-models/private/simulation_core.m
index 883009d8a..6a7867b5f 100644
--- a/matlab/perfect-foresight-models/private/simulation_core.m
+++ b/matlab/perfect-foresight-models/private/simulation_core.m
@@ -33,6 +33,7 @@ if options_.block
         end
         mexErrCheck('bytecode', info);
     else
+        global oo_ options_
         eval([M_.fname '_dynamic']);
     end
 else