diff --git a/usr.sbin/sade/install.c b/usr.sbin/sade/install.c
index 9ae08cb87723..e3364fe7a2c4 100644
--- a/usr.sbin/sade/install.c
+++ b/usr.sbin/sade/install.c
@@ -104,10 +104,10 @@ performNewfs(PartInfo *pi, char *dname, int queue)
 		}
 
 		if (queue == QUEUE_YES) {
-			command_shell_add(pi->mountpoint, buffer);
+			command_shell_add(pi->mountpoint, "%s", buffer);
 			return (0);
 		} else
-			return (vsystem(buffer));
+			return (vsystem("%s", buffer));
 	}
 	return (0);
 }