diff --git a/Tools/sitl_run.sh b/Tools/sitl_run.sh
index 0a5820fd29..85936d2151 100755
--- a/Tools/sitl_run.sh
+++ b/Tools/sitl_run.sh
@@ -43,7 +43,7 @@ else
 fi
 
 # To disable user input
-if [[ -n "$VERBOSE" ]]; then
+if [[ -n "$VERBOSE_SIM" ]]; then
 	verbose="--verbose"
 else
 	verbose=""