diff --git a/ext/tidy/tests/bug77040.phpt b/ext/tidy/tests/bug77040.phpt
new file mode 100644
index 0000000000000..a1af00bdfb70f
--- /dev/null
+++ b/ext/tidy/tests/bug77040.phpt
@@ -0,0 +1,27 @@
+--TEST--
+Bug #77040 (tidyNode::isHtml() is completely broken)
+--SKIPIF--
+<?php
+if (!extension_loaded('tidy')) die('skip tidy extension not available');
+?>
+--FILE--
+<?php
+$tidy = new tidy;
+$tidy->parseString("<p>text</p><p><![CDATA[cdata]]></p>");
+$p = $tidy->body()->child[0];
+var_dump($p->type === TIDY_NODETYPE_START);
+var_dump($p->isHtml());
+$text = $p->child[0];
+var_dump($text->type === TIDY_NODETYPE_TEXT);
+var_dump($text->isHtml());
+$cdata = $tidy->body()->child[1]->child[0];
+var_dump($cdata->type === TIDY_NODETYPE_CDATA);
+var_dump($cdata->isHtml());
+?>
+--EXPECT--
+bool(true)
+bool(true)
+bool(true)
+bool(false)
+bool(true)
+bool(false)
\ No newline at end of file
diff --git a/ext/tidy/tidy.c b/ext/tidy/tidy.c
index 0fde23cb11b48..60170585ce591 100644
--- a/ext/tidy/tidy.c
+++ b/ext/tidy/tidy.c
@@ -1786,11 +1786,14 @@ static TIDY_NODE_METHOD(isHtml)
 {
 	TIDY_FETCH_ONLY_OBJECT;
 
-	if (tidyNodeGetType(obj->node) & (TidyNode_Start | TidyNode_End | TidyNode_StartEnd)) {
-		RETURN_TRUE;
+	switch (tidyNodeGetType(obj->node)) {
+		case TidyNode_Start:
+		case TidyNode_End:
+		case TidyNode_StartEnd:
+			RETURN_TRUE;
+		default:
+			RETURN_FALSE;
 	}
-
-	RETURN_FALSE;
 }
 /* }}} */