diff --git a/www/aptui/create-dataset.php b/www/aptui/create-dataset.php
index 4d07c4e2758968679d04ee43d046f562915e8f18..66fff67841780d5a0b8686820683190df2ba3431 100644
--- a/www/aptui/create-dataset.php
+++ b/www/aptui/create-dataset.php
@@ -25,8 +25,8 @@ chdir("..");
 include("defs.php3");
 chdir("apt");
 include("quickvm_sup.php");
-include("profile_defs.php");
-include("instance_defs.php");
+include_once("profile_defs.php");
+include_once("instance_defs.php");
 # Must be after quickvm_sup.php since it changes the auth domain.
 $page_title = "Create Dataset";
 
diff --git a/www/aptui/instantiate.php b/www/aptui/instantiate.php
index b18e2394b1a63907d4a94fdd6ebad22ad424e54a..9aa4b48dfadfa057bc24269c0835d9b8b723ccdd 100755
--- a/www/aptui/instantiate.php
+++ b/www/aptui/instantiate.php
@@ -28,8 +28,8 @@ include_once("geni_defs.php");
 include_once("webtask.php");
 chdir("apt");
 include("quickvm_sup.php");
-include("instance_defs.php");
-include("profile_defs.php");
+include_once("instance_defs.php");
+include_once("profile_defs.php");
 $page_title = "Instantiate a Profile";
 $dblink = GetDBLink("sa");
 
diff --git a/www/aptui/landing.php b/www/aptui/landing.php
index dbcad88b74e17254fdc4c18fd31bbe95a36c6263..02d53a39a4a0b24932f86e17df41a28e0141e771 100644
--- a/www/aptui/landing.php
+++ b/www/aptui/landing.php
@@ -1,6 +1,6 @@
 <?php
 #
-# Copyright (c) 2000-2014 University of Utah and the Flux Group.
+# Copyright (c) 2000-2015 University of Utah and the Flux Group.
 # 
 # {{{EMULAB-LICENSE
 # 
@@ -26,7 +26,7 @@ include("defs.php3");
 include_once("geni_defs.php");
 chdir("apt");
 include("quickvm_sup.php");
-include("instance_defs.php");
+include_once("instance_defs.php");
 
 #
 # Get current user but make sure coming in on SSL.
diff --git a/www/aptui/manage_profile.php b/www/aptui/manage_profile.php
index 7fc8cd66a000d65388fa74864a7ba4105592d423..4710e9abca8ec987b8f2faf1daae5dac1562c9f1 100644
--- a/www/aptui/manage_profile.php
+++ b/www/aptui/manage_profile.php
@@ -26,8 +26,8 @@ include("defs.php3");
 include_once("webtask.php");
 chdir("apt");
 include("quickvm_sup.php");
-include("profile_defs.php");
-include("instance_defs.php");
+include_once("profile_defs.php");
+include_once("instance_defs.php");
 # Must be after quickvm_sup.php since it changes the auth domain.
 include_once("../session.php");
 $page_title = "Manage Profile";
diff --git a/www/aptui/ppstart.php b/www/aptui/ppstart.php
index a2bad528b53bb17c5a83c4323755701165ca01e2..9947690373d8c9d6854ac61322530303ec8cc1be 100644
--- a/www/aptui/ppstart.php
+++ b/www/aptui/ppstart.php
@@ -25,8 +25,8 @@ chdir("..");
 include("defs.php3");
 chdir("apt");
 include("quickvm_sup.php");
-include("profile_defs.php");
-include("instance_defs.php");
+include_once("profile_defs.php");
+include_once("instance_defs.php");
 
 #
 # Get current user.
diff --git a/www/aptui/show-dataset.php b/www/aptui/show-dataset.php
index 1d69f319383705e2ab47fef9a3a86c61933883b6..1d79e6beb831ea505cd87f8b49fd8f3da5f93166 100644
--- a/www/aptui/show-dataset.php
+++ b/www/aptui/show-dataset.php
@@ -27,9 +27,9 @@ include("lease_defs.php");
 include("imageid_defs.php");
 chdir("apt");
 include("quickvm_sup.php");
-include("dataset_defs.php");
-include("instance_defs.php");
-include("profile_defs.php");
+include_once("dataset_defs.php");
+include_once("instance_defs.php");
+include_once("profile_defs.php");
 # Must be after quickvm_sup.php since it changes the auth domain.
 $page_title = "Show Dataset";
 
diff --git a/www/aptui/show-profile.php b/www/aptui/show-profile.php
index b587ea69e07b7d8e2223b633c12267cc1c42fe01..c6c468411a9a3a1372b5535b4385070d41463acb 100644
--- a/www/aptui/show-profile.php
+++ b/www/aptui/show-profile.php
@@ -26,8 +26,8 @@ include("defs.php3");
 include_once("webtask.php");
 chdir("apt");
 include("quickvm_sup.php");
-include("profile_defs.php");
-include("instance_defs.php");
+include_once("profile_defs.php");
+include_once("instance_defs.php");
 $page_title = "Show Profile";
 
 #
diff --git a/www/aptui/status.php b/www/aptui/status.php
index bfbf0a02c5f5511e28f29fe19765b003bab21dce..ea93b196596b9d9fca7d3a6691df2bcbc07beb44 100644
--- a/www/aptui/status.php
+++ b/www/aptui/status.php
@@ -28,8 +28,8 @@ include_once("geni_defs.php");
 include_once("webtask.php");
 chdir("apt");
 include("quickvm_sup.php");
-include("profile_defs.php");
-include("instance_defs.php");
+include_once("profile_defs.php");
+include_once("instance_defs.php");
 $page_title = "Experiment Status";
 $ajax_request = 0;