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-rw-r--r--src/core.js4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/core.js b/src/core.js
index e122305ce..31d749dd1 100644
--- a/src/core.js
+++ b/src/core.js
@@ -307,8 +307,8 @@ jQuery.extend( {
},
isXMLDoc: function( elem ) {
- var namespace = elem.namespaceURI,
- docElem = ( elem.ownerDocument || elem ).documentElement;
+ var namespace = elem && elem.namespaceURI,
+ docElem = elem && ( elem.ownerDocument || elem ).documentElement;
// Assume HTML when documentElement doesn't yet exist, such as inside
// document fragments.