diff --git a/R/sim_utils.R b/R/sim_utils.R
index db7b80ef58f3b7d3d6d4023c7cdbab0a3827a7e3..3b0e424a05882ae7db92bf1bfe4fc5c38d40de83 100644
--- a/R/sim_utils.R
+++ b/R/sim_utils.R
@@ -221,7 +221,7 @@ construct_ogs_command <- function(ogs6_bin_path){
     if (stringr::str_sub(ogs6_bin_path, -4) == ".sif"){
 
         assertthat::assert_that(file.exists(ogs6_bin_path))
-        ogs6_command <- c("singularity","exec", "--app ogs",
+        ogs6_command <- c("singularity","exec",
                           ogs6_bin_path, "ogs")
     }
     else {