diff --git a/doc/guide/preamble.sdf b/doc/guide/preamble.sdf
index 8eb8cd7c16..e97c5e6c1c 100644
--- a/doc/guide/preamble.sdf
+++ b/doc/guide/preamble.sdf
@@ -17,6 +17,7 @@
 !define DOC_TYPE    "Guide"
 
 !define DOC_LOGO	"../images/LDAPlogo.gif"
+!define DOC_LOGO_BASE "../images/"
 !define DOC_HTML_LOGO ""
 
 !define DOC_LOF_TITLE	"Figures"