diff --git a/languages/Language.php b/languages/Language.php
index c635ebbfd17..95bd31e34b1 100644
--- a/languages/Language.php
+++ b/languages/Language.php
@@ -3130,14 +3130,18 @@ class Language {
 	 * @param string $number
 	 * @return string
 	 */
-	function parseFormattedNumber( $number ) {
+	public function parseFormattedNumber( $number ) {
 		$s = $this->digitTransformTable();
 		if ( $s ) {
+			// eliminate empty array values such as ''. (bug 64347)
+			$s = array_filter( $s );
 			$number = strtr( $number, array_flip( $s ) );
 		}
 
 		$s = $this->separatorTransformTable();
 		if ( $s ) {
+			// eliminate empty array values such as ''. (bug 64347)
+			$s = array_filter( $s );
 			$number = strtr( $number, array_flip( $s ) );
 		}
 
diff --git a/tests/phpunit/languages/LanguageTest.php b/tests/phpunit/languages/LanguageTest.php
index 5e6cba06bb5..a4ef06deacd 100644
--- a/tests/phpunit/languages/LanguageTest.php
+++ b/tests/phpunit/languages/LanguageTest.php
@@ -1484,6 +1484,29 @@ class LanguageTest extends LanguageClassesTestCase {
 		);
 	}
 
+	/**
+	 * @dataProvider parseFormattedNumberProvider
+	 */
+	public function testParseFormattedNumber( $langCode, $number ) {
+		$lang = Language::factory( $langCode );
+
+		$localisedNum = $lang->formatNum( $number );
+		$normalisedNum = $lang->parseFormattedNumber( $localisedNum );
+
+		$this->assertEquals( $number, $normalisedNum );
+	}
+
+	public function parseFormattedNumberProvider() {
+		return array(
+			array( 'de', 377.01 ),
+			array( 'fa', 334 ),
+			array( 'fa', 382.772 ),
+			array( 'ar', 1844 ),
+			array( 'lzh', 3731 ),
+			array( 'zh-classical', 7432 )
+		);
+	}
+
 	/**
 	 * @covers Language::commafy()
 	 * @dataProvider provideCommafyData