diff --git a/common/functions.php b/common/functions.php
index 046586c75..80a9dfbc4 100644
--- a/common/functions.php
+++ b/common/functions.php
@@ -616,7 +616,11 @@ function is_html_content($str)
 	{
 		return true;
 	}
-	
+	$span_tag_count = preg_match_all('!<span\s+style="[^"<>]*?">.+?</span>!i', $str);
+	if ($span_tag_count >= 1)
+	{
+		return true;
+	}
 	return false;
 }
 
diff --git a/tests/unit/functions/FunctionsTest.php b/tests/unit/functions/FunctionsTest.php
index 8c5755435..03fdc20da 100644
--- a/tests/unit/functions/FunctionsTest.php
+++ b/tests/unit/functions/FunctionsTest.php
@@ -176,6 +176,8 @@ class FunctionsTest extends \Codeception\TestCase\Test
 		$this->assertTrue(is_html_content("Hello<br />\nWorld"));
 		$this->assertTrue(is_html_content("<p class='foo'>Hello</p>\n<p class='bar'>World</p>"));
 		$this->assertTrue(is_html_content("<div>Hello<br>\r\n\n\n\n\nWorld</div>"));
+		$this->assertTrue(is_html_content('This is <span style="font-style:italic">italic</span> text.'));
+		$this->assertFalse(is_html_content('This is an empty <span></span> tag. Most editors don\'t produce these.'));
 		$this->assertFalse(is_html_content("You have to use a <p> tag."));
 		$this->assertFalse(is_html_content("This is multiline content.\n<p> tag is here.\nOther lines are here, too.<br>\nMost lines don't have any tags."));
 		$this->assertFalse(is_html_content("<p> tag is unbalanced here.\nAnother line!<br />\nAnd a dangling line..."));