diff --git a/README.md b/README.md
index 1ee230a53..4e618ee79 100644
--- a/README.md
+++ b/README.md
@@ -75,7 +75,7 @@ All input is coerced to a string using the following rules:
 - **isLength(str, options)** - check if the string's length falls in a range. `options` is an object which defaults to `{min:0, max: undefined}`. Note: this function takes into account surrogate pairs.
 - **isLowercase(str)** - check if the string is lowercase.
 - **isMACAddress(str)** - check if the string is a MAC address.
-- **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['zh-CN', 'zh-TW', 'en-ZA', 'en-AU', 'en-HK', 'pt-PT', 'fr-FR', 'el-GR', 'en-GB', 'en-US', 'en-ZM', 'ru-RU', 'nb-NO', 'nn-NO', 'vi-VN', 'en-NZ', 'en-IN', 'es-ES', 'de-DE']`).
+- **isMobilePhone(str, locale)** - check if the string is a mobile phone number, (locale is one of `['zh-CN', 'zh-TW', 'en-ZA', 'en-AU', 'en-HK', 'pt-PT', 'fr-FR', 'el-GR', 'en-GB', 'en-US', 'en-ZM', 'ru-RU', 'nb-NO', 'nn-NO', 'vi-VN', 'en-NZ', 'en-IN', 'es-ES', 'de-DE', 'fi-FI']`).
 - **isMongoId(str)** - check if the string is a valid hex-encoded representation of a [MongoDB ObjectId][mongoid].
 - **isMultibyte(str)** - check if the string contains one or more multibyte chars.
 - **isNull(str)** - check if the string is null.
diff --git a/test/validators.js b/test/validators.js
index 47c840c49..dccc33ca3 100644
--- a/test/validators.js
+++ b/test/validators.js
@@ -1799,6 +1799,36 @@ describe('Validators', function () {
       });
     });
 
+    test({
+      validator: 'isMobilePhone'
+      , valid: [
+        '+358505557171'
+        , '0455571'
+        , '0505557171'
+        , '00358505557171'
+        , '04412345'
+        , '0457 123 45 67'
+        , '+358457 123 45 67'
+        , '+358 50 555 7171'
+      ]
+      , invalid: [
+        '12345'
+        , ''
+        , '045557'
+        , '045555717112312332423423421'
+        , 'Vml2YW11cyBmZXJtZtesting123'
+        , '010-38238383'
+        , '+3-585-0555-7171'
+        , '+9676338855'
+        , '19676338855'
+        , '6676338855'
+        , '+99676338855'
+        , '044123'
+        , '019123456789012345678901'
+      ],
+      args: ['fi-FI']
+    });
+
     it('should validate currency', function() {
       test({
           validator: 'isCurrency'
diff --git a/validator.js b/validator.js
index 19bead63e..a535ecf60 100644
--- a/validator.js
+++ b/validator.js
@@ -107,7 +107,8 @@
       'en-NZ': /^(\+?64|0)2\d{7,9}$/,
       'en-IN': /^(\+?91|0)?[789]\d{9}$/,
       'es-ES': /^(\+34)?(6\d{1}|7[1234])\d{7}$/,
-      'de-DE': /^(\+?49[ \.\-])?([\(]{1}[0-9]{1,6}[\)])?([0-9 \.\-\/]{3,20})((x|ext|extension)[ ]?[0-9]{1,4})?$/
+      'de-DE': /^(\+?49[ \.\-])?([\(]{1}[0-9]{1,6}[\)])?([0-9 \.\-\/]{3,20})((x|ext|extension)[ ]?[0-9]{1,4})?$/,
+      'fi-FI': /^(00358|\+358|0)\s?(4|40|41|42|44|45|50)\s?(\d\s?){4,8}\d$/
     };
 
     // from http://goo.gl/0ejHHW