diff --git a/addressbook/acl_preferences.php b/addressbook/acl_preferences.php
index 00e7c78788..776e11b049 100755
--- a/addressbook/acl_preferences.php
+++ b/addressbook/acl_preferences.php
@@ -91,6 +91,10 @@
 		// Group records
 		$group_variable = 'g_'.$phpgw_info['flags']['currentapp'];
 
+		if (!$$group_variable)
+		{
+			$$group_variable = array();
+		}
 		@reset($$group_variable);
 		while(list($group_id,$acllist) = each($$group_variable))
 		{
@@ -105,6 +109,10 @@
 		// User records
 		$user_variable = 'u_'.$phpgw_info['flags']['currentapp'];
     
+		if (!$$user_variable)
+		{
+			$$user_variable = array();
+		}
 		@reset($$user_variable);
 		while(list($user_id,$acllist) = each($$user_variable))
 		{
diff --git a/calendar/acl_preferences.php b/calendar/acl_preferences.php
index 98c01b9871..d8d0647799 100755
--- a/calendar/acl_preferences.php
+++ b/calendar/acl_preferences.php
@@ -92,6 +92,10 @@
 		// Group records
 		$group_variable = 'g_'.$phpgw_info['flags']['currentapp'];
 
+		if (!$$group_variable)
+		{
+			$$group_variable = array();
+		}
 		@reset($$group_variable);
 		while(list($group_id,$acllist) = each($$group_variable))
 		{
@@ -105,7 +109,11 @@
 
 		// User records
 		$user_variable = 'u_'.$phpgw_info['flags']['currentapp'];
-    
+
+		if (!$$user_variable)
+		{
+			$$user_variable = array();
+		}
 		@reset($$user_variable);
 		while(list($user_id,$acllist) = each($$user_variable))
 		{