diff --git a/src/doc/new-doc/introduction/history.txi b/src/doc/new-doc/introduction/history.txi
index 9f75673fb..7846f5536 100644
--- a/src/doc/new-doc/introduction/history.txi
+++ b/src/doc/new-doc/introduction/history.txi
@@ -11,7 +11,7 @@ featured a lisp to C translator.
 
 @float Figure,fig:hierarchy
 @caption{ECL's family tree}
-@image{figures/kcl-hierarchy,,,png}
+@image{figures/kcl-hierarchy,,4.5in}
 @end float
 
 The KCL implementation remained a propietary project for some