diff --git a/phpBB/phpbb/textformatter/s9e/factory.php b/phpBB/phpbb/textformatter/s9e/factory.php
index d339e3311d..dca1c78d40 100644
--- a/phpBB/phpbb/textformatter/s9e/factory.php
+++ b/phpBB/phpbb/textformatter/s9e/factory.php
@@ -110,7 +110,7 @@ class factory implements \phpbb\textformatter\cache_interface
 		'i'     => '<span style="font-style: italic"><xsl:apply-templates/></span>',
 		'u'     => '<span style="text-decoration: underline"><xsl:apply-templates/></span>',
 		'img'   => '<img src="{IMAGEURL}" class="postimage" alt="{L_IMAGE}"/>',
-		'size'	=> '<span><xsl:attribute name="style"><xsl:text>font-size: </xsl:text><xsl:value-of select="substring(@FONTSIZE, 1, 4)"/><xsl:text>%; line-height: normal</xsl:text></xsl:attribute><xsl:apply-templates/></span>',
+		'size'	=> '<span><xsl:attribute name="style"><xsl:text>font-size: </xsl:text><xsl:value-of select="substring(@size, 1, 4)"/><xsl:text>%; line-height: normal</xsl:text></xsl:attribute><xsl:apply-templates/></span>',
 		'color' => '<span style="color: {COLOR}"><xsl:apply-templates/></span>',
 		'email' => '<a>
 			<xsl:attribute name="href">
diff --git a/tests/text_formatter/s9e/default_formatting_test.php b/tests/text_formatter/s9e/default_formatting_test.php
index a35c9138a5..1aa4f0bc3a 100644
--- a/tests/text_formatter/s9e/default_formatting_test.php
+++ b/tests/text_formatter/s9e/default_formatting_test.php
@@ -70,7 +70,7 @@ class phpbb_textformatter_s9e_default_formatting_test extends phpbb_test_case
 			),
 			array(
 				'[size=75]smaller[/size]',
-				'<span style="font-size:75%;line-height:normal">smaller</span>'
+				'<span style="font-size: 75%; line-height: normal">smaller</span>'
 			),
 			array(
 				'[quote]quoted[/quote]',
diff --git a/tests/text_processing/tickets_data/PHPBB3-13921.html b/tests/text_processing/tickets_data/PHPBB3-13921.html
index 690668ef28..6a9dc7f504 100644
--- a/tests/text_processing/tickets_data/PHPBB3-13921.html
+++ b/tests/text_processing/tickets_data/PHPBB3-13921.html
@@ -1 +1 @@
-<span style="font-size:200%;line-height:normal"></span><div style="text-align:center"><span style="font-size:200%;line-height:normal">xxx</span></div>
\ No newline at end of file
+<span style="font-size: 200%; line-height: normal"></span><div style="text-align:center"><span style="font-size: 200%; line-height: normal">xxx</span></div>
\ No newline at end of file