diff --git a/mozilla/webtools/bugzilla/showdependencygraph.cgi b/mozilla/webtools/bugzilla/showdependencygraph.cgi
index c05911ee29b..24d0cdfa573 100755
--- a/mozilla/webtools/bugzilla/showdependencygraph.cgi
+++ b/mozilla/webtools/bugzilla/showdependencygraph.cgi
@@ -31,6 +31,10 @@ ConnectToDatabase();
 
 quietly_check_login();
 
+# Connect to the shadow database if this installation is using one to improve
+# performance.
+Bugzilla->instance->switch_to_shadow_db();
+
 use vars qw($template $vars $userid);
 
 my %seen;
diff --git a/mozilla/webtools/bugzilla/showdependencytree.cgi b/mozilla/webtools/bugzilla/showdependencytree.cgi
index 0508f078bf1..e246d5c8d7d 100755
--- a/mozilla/webtools/bugzilla/showdependencytree.cgi
+++ b/mozilla/webtools/bugzilla/showdependencytree.cgi
@@ -37,6 +37,10 @@ ConnectToDatabase();
 
 quietly_check_login();
 
+# Connect to the shadow database if this installation is using one to improve
+# performance.
+Bugzilla->instance->switch_to_shadow_db();
+
 # More warning suppression silliness.
 $::userid = $::userid;