diff --git a/install_rally.sh b/install_rally.sh
index e51722aff8..4a59239d1f 100755
--- a/install_rally.sh
+++ b/install_rally.sh
@@ -257,7 +257,7 @@ which_missing_packages () {
 # TODO: move this logic into install_required_sw
 if ! have_command wget && ! have_command curl; then
     if ask_yn "You need ether wget or curl to be installed. Install wget?"; then
-        apt-get install -yes wget || yum install -y wget
+        apt-get install --yes wget || yum install -y wget
     fi
 fi