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-rw-r--r--doc/help/spec-stp.html1
1 files changed, 1 insertions, 0 deletions
diff --git a/doc/help/spec-stp.html b/doc/help/spec-stp.html
index 5884690c2..fd46937f8 100644
--- a/doc/help/spec-stp.html
+++ b/doc/help/spec-stp.html
@@ -1,3 +1,4 @@
+<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<HTML>
<!-- SECTION: Specifications -->
<HEAD>