diff --git a/reactos/lib/rtl/actctx.c b/reactos/lib/rtl/actctx.c
index 40883a8ff22..eb07758c8cf 100644
--- a/reactos/lib/rtl/actctx.c
+++ b/reactos/lib/rtl/actctx.c
@@ -239,7 +239,7 @@ static UNICODE_STRING xmlstr2unicode(const xmlstr_t *xmlstr)
     UNICODE_STRING res;
 
     res.Buffer = (PWSTR)xmlstr->ptr;
-    res.Length = res.MaximumLength = xmlstr->len;
+    res.Length = res.MaximumLength = xmlstr->len * sizeof(WCHAR);
 
     return res;
 }