diff --git a/tzselect.ksh b/tzselect.ksh
index 04762b4..c93d668 100644
--- a/tzselect.ksh
+++ b/tzselect.ksh
@@ -140,7 +140,7 @@ else
   }
 fi
 
-while getopts c:n:-: opt
+while getopts c:n:t:-: opt
 do
     case $opt$OPTARG in
     c*)