diff --git a/powerlevel9k.zsh-theme b/powerlevel9k.zsh-theme
index 388141f9..ee5b6564 100755
--- a/powerlevel9k.zsh-theme
+++ b/powerlevel9k.zsh-theme
@@ -835,8 +835,9 @@ prompt_dir() {
       fi
     ;;
     truncate_to_unique)
-      local -i i=2 n=1
+      local -i i=2 n=1 d=0
       delim=${POWERLEVEL9K_SHORTEN_DELIMITER-'*'}
+      d=${POWERLEVEL9K_SHORTEN_DELIMITER_LENGTH:-$#POWERLEVEL9K_SHORTEN_DELIMITER}
       (( POWERLEVEL9K_SHORTEN_DIR_LENGTH >= 0 )) && n=POWERLEVEL9K_SHORTEN_DIR_LENGTH
       local pat=${POWERLEVEL9K_SHORTEN_FOLDER_MARKER-'(.bzr|CVS|.git|.hg|.svn|.citc)'}
       local parent="${PWD%/${(pj./.)parts[i,-1]}}"
@@ -850,11 +851,11 @@ prompt_dir() {
           fi
         fi
         local -i j=1
-        for (( ; j + $#delim < $#dir; ++j )); do
+        for (( ; j + d < $#dir; ++j )); do
           local -a matching=($parent/$dir[1,j]*/(N))
           (( $#matching == 1 )) && break
         done
-        (( j + $#delim >= $#dir )) || parts[i]=$dir[1,j]$'\0'
+        (( j + d >= $#dir )) || parts[i]=$dir[1,j]$'\0'
         parent+=/$dir
       done
     ;;