diff --git a/data/syntax/javascript.xml b/data/syntax/javascript.xml
--- a/data/syntax/javascript.xml
+++ b/data/syntax/javascript.xml
@@ -162,13 +162,13 @@
 
       <context attribute="String" lineEndContext="#pop" name="String">
         <HlCStringChar attribute="Escape" />
-        <RegExpr attribute="Escape" String="\\u[0-9a-fA-F]{4}" />
+        <RegExpr attribute="Escape" String="\\u([0-9a-fA-F]{4}|\{[0-9a-fA-F]+\})" />
         <LineContinue/>
         <DetectChar attribute="String" context="#pop" char="&quot;" />
       </context>
       <context attribute="String" lineEndContext="#pop" name="String SQ">
         <HlCStringChar attribute="Escape" />
-        <RegExpr attribute="Escape" String="\\u[0-9a-fA-F]{4}" />
+        <RegExpr attribute="Escape" String="\\u([0-9a-fA-F]{4}|\{[0-9a-fA-F]+\})" />
         <LineContinue/>
         <DetectChar attribute="String" context="#pop" char="'" />
       </context>