diff --git a/lib/termsupport.zsh b/lib/termsupport.zsh
index bd0cf6ff..58c6203a 100644
--- a/lib/termsupport.zsh
+++ b/lib/termsupport.zsh
@@ -1,13 +1,21 @@
-#usage: title short_tab_title looooooooooooooooooooooggggggg_windows_title
-#http://www.faqs.org/docs/Linux-mini/Xterm-Title.html#ss3.1
-#Fully support screen, iterm, and probably most modern xterm and rxvt
+# Set terminal window and tab/icon title
+#
+# usage: title short_tab_title [long_window_title]
+#
+# See: http://www.faqs.org/docs/Linux-mini/Xterm-Title.html#ss3.1
+# Fully supports screen, iterm, and probably most modern xterm and rxvt
+# (In screen, only short_tab_title is used)
+# Limited support for Apple Terminal (Terminal can't set window and tab separately)
 function title {
-  if [[ "$DISABLE_AUTO_TITLE" == "true" ]] || [[ "$EMACS" == *term* ]]; then
-    return
-  fi
+  [[ "$EMACS" == *term* ]] && return
+
+  # if $2 is unset use $1 as default
+  # if it is set and empty, leave it as is
+  : ${2=$1}
+
   if [[ "$TERM" == screen* ]]; then
     print -Pn "\ek$1:q\e\\" #set screen hardstatus, usually truncated at 20 chars
-  elif [[ "$TERM" == xterm* ]] || [[ $TERM == rxvt* ]] || [[ $TERM == ansi ]] || [[ "$TERM_PROGRAM" == "iTerm.app" ]]; then
+  elif [[ "$TERM" == xterm* ]] || [[ "$TERM" == rxvt* ]] || [[ "$TERM" == ansi ]] || [[ "$TERM_PROGRAM" == "iTerm.app" ]]; then
     print -Pn "\e]2;$2:q\a" #set window name
     print -Pn "\e]1;$1:q\a" #set icon (=tab) name
   fi
@@ -18,6 +26,10 @@ ZSH_THEME_TERM_TITLE_IDLE="%n@%m: %~"
 
 # Runs before showing the prompt
 function omz_termsupport_precmd {
+  if [[ $DISABLE_AUTO_TITLE == true ]]; then
+    return
+  fi
+
   title $ZSH_THEME_TERM_TAB_TITLE_IDLE $ZSH_THEME_TERM_TITLE_IDLE
 
   # Notify Terminal.app of current directory using undocumented OSC sequence
@@ -30,6 +42,10 @@ function omz_termsupport_precmd {
 
 # Runs before executing the command
 function omz_termsupport_preexec {
+  if [[ $DISABLE_AUTO_TITLE == true ]]; then
+    return
+  fi
+
   emulate -L zsh
   setopt extended_glob