diff --git a/phpBB/phpbb/template/twig/lexer.php b/phpBB/phpbb/template/twig/lexer.php
index 4f88147542..1a640e559e 100644
--- a/phpBB/phpbb/template/twig/lexer.php
+++ b/phpBB/phpbb/template/twig/lexer.php
@@ -236,7 +236,8 @@ class phpbb_template_twig_lexer extends Twig_Lexer
 		// Replace our "div by" with Twig's divisibleby (Twig does not like test names with spaces)
 		$code = preg_replace('# div by ([0-9]+)#', ' divisibleby($1)', $code);
 
-		return preg_replace_callback('#<!-- (ELSE)?IF((.*)[\s][\$|\.|!]([^\s]+)(.*))-->#', $callback, $code);
+		// (ELSE)?\s?IF; match IF|ELSEIF|ELSE IF; replace ELSE IF with ELSEIF
+	   	return preg_replace_callback('#<!-- (ELSE)?\s?IF(.+?)-->#', $callback, $code);
 	}
 
 	/**
diff --git a/tests/template/template_test.php b/tests/template/template_test.php
index dd9ba21c26..2a40107d90 100644
--- a/tests/template/template_test.php
+++ b/tests/template/template_test.php
@@ -62,6 +62,13 @@ class phpbb_template_template_test extends phpbb_template_template_test_case
 				array(),
 				'1!false',
 			),
+			array(
+				'if.html',
+				array('S_OTHER_OTHER_VALUE' => true),
+				array(),
+				array(),
+				'|S_OTHER_OTHER_VALUE|!false',
+			),
 			array(
 				'if.html',
 				array('S_VALUE' => false, 'S_OTHER_VALUE' => true),
diff --git a/tests/template/templates/if.html b/tests/template/templates/if.html
index c010aff7fa..f6ab6e575a 100644
--- a/tests/template/templates/if.html
+++ b/tests/template/templates/if.html
@@ -2,6 +2,8 @@
 1
 <!-- ELSEIF S_OTHER_VALUE -->
 2
+<!-- ELSE IF S_OTHER_OTHER_VALUE -->
+|S_OTHER_OTHER_VALUE|
 <!-- ELSE -->
 03
 <!-- ENDIF -->