diff --git a/communication_techniques/lancement.sh b/communication_techniques/lancement.sh
index 52b5b93..d3b64de 100755
--- a/communication_techniques/lancement.sh
+++ b/communication_techniques/lancement.sh
@@ -71,7 +71,7 @@ function_run () {
 	case $typeProd in
 		"none" ) optTypeProd="" ;;
 		"matrice" ) optTypeProd="-c lib/${calcDir}/libcalc_mat.so 16" ;;
-		"useless_loop" ) optTypeProd="-c lib/${calcDir}/libcalc_useless_loop.so ${nb_useless_loop}" ;;
+		"useless_loop" ) optTypeProd="-c lib/${calcDir}/libcalc_useless_loop.so ${argTypeProd}" ;;
 		* ) exit 1 ;;
 	esac
 	case $typeCache in