diff --git a/lib/termsupport.zsh b/lib/termsupport.zsh
index 9ff8a811c..70b54301d 100644
--- a/lib/termsupport.zsh
+++ b/lib/termsupport.zsh
@@ -55,35 +55,58 @@ preexec_functions+=(omz_termsupport_preexec)
 
 # Keep Apple Terminal.app's current working directory updated
 # Based on this answer: http://superuser.com/a/315029
+# With extra fixes to handle multibyte chars and non-UTF-8 locales
 
 if [[ "$TERM_PROGRAM" == "Apple_Terminal" ]] && [[ -z "$INSIDE_EMACS" ]]; then
+
+  # URL-encodes a string
+  # Outputs the encoded string on stdout
+  # Returns nonzero if encoding failed
+  function _omz_urlencode() {
+    local url_str=''
+    {
+      local str=$1
+
+      # URLs must use UTF-8 encoding; convert if required
+      local encoding=${LC_CTYPE/*./}
+      if [[ $encoding != UTF-8 ]]; then
+        str=$(iconv -f $encoding -t UTF-8)
+        if [[ $? != 0 ]]; then
+          echo "Error converting string from $encoding to UTF-8" >&2
+          return 1
+        fi
+      fi
+
+      # Use LC_CTYPE=C to process text byte-by-byte
+      local i ch hexch LC_CTYPE=C
+      for ((i = 1; i <= ${#str}; ++i)); do
+        ch="$str[i]"
+        if [[ "$ch" =~ [/._~A-Za-z0-9-] ]]; then
+          url_str+="$ch"
+        else
+          hexch=$(printf "%02X" "'$ch")
+          url_str+="%$hexch"
+        fi
+      done
+      echo $url_str
+    }
+  }
+
   # Emits the control sequence to notify Terminal.app of the cwd
   function update_terminalapp_cwd() {
-        # Identify the directory using a "file:" scheme URL, including
-        # the host name to disambiguate local vs. remote paths.
+    # Identify the directory using a "file:" scheme URL, including
+    # the host name to disambiguate local vs. remote paths.
 
-        # Percent-encode the pathname.
-        local URL_PATH=''
-        {
-            # Use LC_CTYPE=C to process text byte-by-byte.
-            local i ch hexch LC_CTYPE=C
-            for ((i = 1; i <= ${#PWD}; ++i)); do
-                ch="$PWD[i]"
-                if [[ "$ch" =~ [/._~A-Za-z0-9-] ]]; then
-                    URL_PATH+="$ch"
-                else
-                    hexch=$(printf "%02X" "'$ch")
-                    URL_PATH+="%$hexch"
-                fi
-            done
-        }
+    # Percent-encode the pathname.
+    local URL_PATH=$(_omz_urlencode $PWD)
+    [[ $? != 0 ]] && return 1
+    local PWD_URL="file://$HOST$URL_PATH"
+    # Undocumented Terminal.app-specific control sequence
+    printf '\e]7;%s\a' $PWD_URL
+  }
 
-        local PWD_URL="file://$HOST$URL_PATH"
-        printf '\e]7;%s\a' "$PWD_URL"
-    }
-
-    # Use a precmd hook instead of a chpwd hook to avoid contaminating output
-    precmd_functions+=(update_terminalapp_cwd)
-    # Run once to get initial cwd set
-    update_terminalapp_cwd
+  # Use a precmd hook instead of a chpwd hook to avoid contaminating output
+  precmd_functions+=(update_terminalapp_cwd)
+  # Run once to get initial cwd set
+  update_terminalapp_cwd
 fi