diff --git a/R/sim_utils.R b/R/sim_utils.R
index ba5a0076041dd84ca4dfc858205a003f5e8e4345..0147a6d8f622a291138370b43297580e32d54886 100644
--- a/R/sim_utils.R
+++ b/R/sim_utils.R
@@ -29,7 +29,7 @@ ogs6_run_simulation <- function(ogs6_obj,
 
     ogs6_read_output_files(ogs6_obj = ogs6_obj)
 
-    return(invisible(exit_code))
+    return(exit_code)
 }
 
 
@@ -177,7 +177,7 @@ ogs6_call_ogs6 <- function(ogs6_obj,
                              args = ogs6_args)
     }
 
-    return(invisible(exit_code))
+    return(exit_code)
 }