diff --git a/installer.sh b/installer.sh
index 07f7a7c..6ecbd2a 100644
--- a/installer.sh
+++ b/installer.sh
@@ -324,7 +324,7 @@ topt=${opt//+/}
 topt="${topt%"${topt##*[![:space:]]}"}"  
 topt=\"$topt\"
 option=${option//"$topt"/}
-unset $topt
+unset topt
 else
 opts[choice]=+
 opt="${opt%"${opt##*[![:space:]]}"}"