diff --git a/dlls/msxml3/xslpattern.l b/dlls/msxml3/xslpattern.l
index bda383602cf..58df30909d3 100644
--- a/dlls/msxml3/xslpattern.l
+++ b/dlls/msxml3/xslpattern.l
@@ -152,6 +152,7 @@ ANY                 (.)
 
 %%
 
+xmlChar* XSLPattern_to_XPath(xmlXPathContextPtr, xmlChar const*) DECLSPEC_HIDDEN;
 xmlChar* XSLPattern_to_XPath(xmlXPathContextPtr ctxt, xmlChar const* xslpat_str)
 {
     parser_param p;