diff --git a/code/model/SiteTreeLinkTracking.php b/code/model/SiteTreeLinkTracking.php
index fead777c..9e3638e1 100644
--- a/code/model/SiteTreeLinkTracking.php
+++ b/code/model/SiteTreeLinkTracking.php
@@ -217,14 +217,18 @@ class SiteTreeLinkTracking_Parser {
 			$matches = array();
 			if(preg_match('/\[sitetree_link(?:\s*|%20|,)?id=([0-9]+)\](#(.*))?/i', $href, $matches)) {
 				$page = DataObject::get_by_id('SiteTree', $matches[1]);
+				$broken = false;
+
 				if (!$page) {
 					// Page doesn't exist.
 					$broken = true;
-				} else if (!empty($matches[3]) && !preg_match("/(name|id)=\"{$matches[3]}\"/", $page->Content)) {
-					// Broken anchor on the target page.
-					$broken = true;
-				} else {
-					$broken = false;
+				} else if (!empty($matches[3])) {
+					$anchor = preg_quote($matches[3], '/');
+
+					if (!preg_match("/(name|id)=\"{$anchor}\"/", $page->Content)) {
+						// Broken anchor on the target page.
+						$broken = true;
+					}
 				}
 
 				$results[] = array(
diff --git a/tests/model/SiteTreeLinkTrackingTest.php b/tests/model/SiteTreeLinkTrackingTest.php
index 98ccb71f..e5967631 100644
--- a/tests/model/SiteTreeLinkTrackingTest.php
+++ b/tests/model/SiteTreeLinkTrackingTest.php
@@ -32,6 +32,7 @@ class SiteTreeLinkTrackingTest extends SapphireTest {
 		$this->assertFalse($this->isBroken("<a href=\"[sitetree_link,id=$page->ID]#yes-name-anchor\">link</a>"));
 		$this->assertFalse($this->isBroken("<a href=\"[sitetree_link,id=$page->ID]#yes-id-anchor\">link</a>"));
 		$this->assertFalse($this->isBroken("<a href=\"[file_link,id=$file->ID]\">link</a>"));
+		$this->assertTrue($this->isBroken("<a href=\"[sitetree_link,id=$page->ID]#http://invalid-anchor.com\"></a>"));
 	}
 
 	function highlight($content) {